DEPA Air Operated Diaphragm Pumps

Transcription

1 DEPA Air Operated Diaphragm Pumps Series M Type DL Cast Metal Pumps DEPA air operated diaphragm pumps made of cast metal are the best suitable solution for most industrial applications. Many years experience in the design and manufacture of air operated diaphragm pumps have resulted in these high performance units. Because of their compact, lightweight construction, they are well suited to portable and mobile applications as well as fixed installation in process plants. All types of fluids from water to slurries and pastes, including abrasive or shear sensitive media containing solids, are handled cost effectively by these pumps. Choice of just the right Series M unit to satisfy the requirement in each case is facilitated by availability of three different materials for the pump housing: * Cast Aluminium, AL * Ductile Iron, GGG 4 * Cast Stainless Steel,.448 (SS 6) * Cast Hastelloy C Series M pumps are manufactured in five different sizes with standard connections: DN 5 to DN 8, ( in. to in.) All models are completely self contained, only requiring connection to pipework and air supply. Standard design Features include maintenance free control valve, stainless steel base with integral anti vibration mounts, drain and vent connections, stainless steel clamp bands, air intake filter (for DL5 to DL8) and muffler. Accessories A complete range of accessories simplifies operation and enhances flexibility. They include pulsation dampeners, monitoring and control systems, various transport devices, quick release couplings, adapters etc. For more information, please contact your local supplier. Ideal for abrasive, viscous and shear sensitive media, and for products with entrained solids. Tolerance of dry running and harsh usage. Minimal maintenance with no lubrication required. Positive displacement pumping action minimises pro duct shear. Completely enclosed units with no bearings or rotary seals in the product stream. Air operation means suitability for explosive or hazardous areas. Easy control of flow rate by regulating air supply. No need for electric motors, special drives or base plates. Easily portable and ready to use by simply connecting to air supply. Can be run against a closed discharge a vital benefit for use on filling machines. Self priming and submersible. Rugged construction in cast aluminium, ductile iron or cast stainless steel. DE/DB--GB /.6 / MD

2 DEPA Air Operated Diaphragm Pumps Series M Type DL Cast Metal Pumps Series M Type DL Operating Principle Discharge Double acting, positive displacement Series M pumps operate with two alternating pumping chambers. The compressed air which drives the unit is admitted through a control valve, to the rear of each diaphragm in turn, so displacing the medium from alternate pumping chambers. In the pump illustrated, the right hand pumping chamber is in the intake position. A vacuum has been created by the retraction of the diaphragm and the pumped medium flows into the chamber. The left hand diaphragm, which is supported by compressed air, simultaneously displaces the medium present in this chamber. Process side Air side Process side Since the two diaphragms are connected by a common piston rod, suction always occurs in one chamber whilst discharge is occurring in the other. Suction Materials of construction available as standard series DL 4 SA T T T Pump size Connections in. DN 5 5 Connections in. DN 5 5 Connections in. DN 4 4 Connections in. DN 5 5 Connections in. DN 8 8 Major subassemblies Housing Wetted piston Centre block Cast Steel Cast AA aluminium aluminium Cast Stainless steel Cast FA aluminium AISI aluminium (.454) Ductile iron Steel Cast CA aluminium Ductile iron Steel Cast bronze CX Cast stainless Stainless steel Cast SA steel AISI 6 AISI aluminium (.448) (.454) Cast stainless Stainless steel Cast bronze SX steel AISI 6 AISI (.448) (.454) Hastelloy C Hastelloy C Stainless Steel HS Internals Diaphragm Seats Balls NRS B B B ) NBR (Buna N) N N N ) EPDM (Nordel) E E E ) EPDM (grey) G G G ) FKM (Viton) F F PTFE (Teflon) T T T stainless steel R NBR, steel core Y ) EPDM, steel core W ) EPDM, grey, with steel core X ) PTFE, steel core Z ) NRS, steel core V ) NRR L Hytrel H PTFE-Verbund -in-one Z ) For DL5 only Particle size and suction lift Pump size Particle size mm Suction lift in mwc dry ) Wetted Maximum operating temperature C Metal pumps with internal components of NRS 8 NBR, EPDM FKM 4 PTFE ) For pumps equipped with valve seats and valve balls of PTFE a decrease in suction lift must be expected.

3 DEPA Air Operated Diaphragm Pumps Series M Type DL Cast Metal Pumps Pump weight in kg Housing type FA CA CX SA SX HS Pump size Performance characteristics of Series M Type DL cast metal models Type DL5, Elastomer Diaphragm Total discharge head [bar] Air pressure 7 bar 6 bar 5 bar 4 bar bar Air consumption [Nm /min] Air pressure 7 bar 6 bar 5 bar 4 bar bar Flow rate [m /h] Flow rate [m /h] Type DL5, Elastomer Diaphragm Total discharge head [bar] Air pressure 7 bar 6 bar 5 bar 4 bar bar bar Air consumption [Nm /min] Air pressure 7 bar 6 bar 5 bar 4 bar bar bar Flow rate [m /h] Flow rate [m /h]

4 DEPA Air Operated Diaphragm Pumps Series M Type DL Cast Metal Pumps Type DL4, Elastomer Diaphragm Total discharge head [bar] Air pressure 7 bar 6 bar 5 bar 4 bar bar Air consumption [Nm /min] Air pressure 7 bar 6 bar 5 bar 4 bar bar bar.4 bar Flow rate [m /h] Flow rate [m /h] Type DL5, Elastomer Diaphragm Total discharge head [bar] Air pressure 7 bar 6 bar 5 bar 4 bar bar bar Air consumption [Nm /min] Air pressure 7 bar 6 bar 5 bar 4 bar bar bar Flow rate [m /h] Flow rate [m /h] Type DL8, Elastomer Diaphragm Total discharge head [bar] Air pressure 7 bar 6 bar 5 bar 4 bar bar bar Air consumption [Nm /min] Air pressure 7 bar 6 bar 5 bar 4 bar bar bar Flow rate [m /h] Flow rate [m /h] Example: To help you select the correct pump size Required pumping rate is 7 m /h and required total discharge head is m. The correct selection is DL 5, the required air pressure is.8 bar and the air consumption is.5 Nm /min. 4

5 DEPA Air Operated Diaphragm Pumps Series M Type DL Cast Metal Pumps Available pump capacity % Decrease in pumping rate for viscous liquids Exemple: During the conveyance of a product with a viscosity of 6 mpa s, the pumping rate decreases to 6 percent of the rated value, based on water, 4, 6, 8,,, 4, 6, 8,,, Viscosity of the transported medium mpa s/c P Decrease in pumping rate % Decrease in pumping rate for specified suction lift Exemple: With a suction lift of 4 mwc, the pumping rate decreases by about %. This figure varies with different pump configurations mwc Suction head Extremely rugged construction reduces downtime to a minimum. DEPA pumps have been designed in such a way that all components in contact with the product can be disassembled and reassembled within a few minutes. This means that servicing work is reduced to the absolute minimum. DEPA air driven diaphragm pumps have been developed as a modular system. Consequently, many components some of which are common to all versions are mutually compatible and interchangeable. This flexible construction allows quick and simple changing of the internals for all Type DL models, to fulfil different applications. 5

6 DEPA Air Operated Diaphragm Pumps Series M Type DL Cast Metal Pumps Discharge Air connection Suction Dimensions for all cast metal sizes Size A B C D E F G H I K Air connection 4 in. 8 in. 8 in. 4 in. 4 in. All dimensions shown in mm There is a DEPA diaphragm pump for practically every liquid that flows. DEPA air driven diaphragm pumps are available in three different basic constructions: cast metal, solid plastic and highly polished stainless steel (CIP compatible). Special purpose designed models are available for powders, high pressures up to bar and drum pumping of hard-to-handle drum contents. For more information please contact your local supplier. All information published here is subject to change without notice.

7 DEPA Air Driven Diaphragm Pumps Series M High Pressure Type DB for Delivery Pressures up to bar Ideal for closed delivery (dead head) applications or where air pressure is abnormally low. DEPA air driven diaphragm pumps provide a cost saving solution for dead head applications since they require no costly controls. Due to the pressure compensation between the air and product sides, the pump simply stops working in these conditions, without generating heat, wear or leakage. Thanks to these features, DEPA air driven diaphragm pumps have been widely used for filter press feeding duties for many years. Standard Series M models already achieve 6.5 bar filter pressure with an applied air pressure of 7 bar. Many operators want still higher pressures for greater filter press efficiency and the DB High Pressure version of the DEPA Series M air operated diaphragm pumps has been developed to fulfil this requirement. These pumps can achieve a delivery pressure of bar with a driving air pressure of 6 bar. Standard Equipment Maintenance free control system, stainless steel base frame with integral anti-vibration mounts, flanged construction, air inlet filter and a new design muffler. Drain and vent connections are also provided. Further Accessories Pulsation dampeners, monitoring and control systems, various transport devices, plus various couplings and adaptors for suction and discharge connections and for air connections. Exceptionally economical in operation against a closed discharge (i.e. filter press). No special control devices required. Diaphragm is pressure loaded giving equal pressure on both sides of the diaphragm. Good performance on low pressure pumping duties where air supply pressure is low. Ideal for abrasive, viscous, shear sensitive and solids bearing media. Tolerance of dry running and harsh usage. Minimal maintenance with no lubrication or oil required. Completely enclosed units with no bearings or rotary seals in contact with the product stream. Air operation means suitability for explosive and hazardous areas plus easy control by simply regulating the air supply. No need for electric motors, special drives or base plates. Easily portable and ready to use by simply connecting to air supply. Can be run against a closed discharge a vital benefit for use on filling machines and filter presses. Self priming. Rugged construction in ductile iron or cast stainless steel. Three connection sizes: in., in. and in. DE/DB--GB /.99 / MD

8 DEPA Air Driven Diaphragm Pumps Operating Principle of the Type DB High Pressure Range DEPA Series M pumps deliver the pumped medium alternately via two pump chambers. In this case, driving air enters through the control valve at the rear of the corresponding diaphragm in operation, so displacing the medium from alternate pump chambers. The pressure multiplier increases the pressure of the incoming air. With an air supply pressure of 6 bar, a maximum pumping pressure of bar can be attained. Process side Discharge Air side Process side Under load or against a closed discharge, the pump will stop and hold the given pressure without stress on the pump components and without need of additional control devices. Suction Materials of construction available as standard series: DB 4 CA D E E Pump size Connections, DN 5 5 Connections, DN 4 4 Connections, DN 5 5 Major subassemblies Housing Wetted piston Centre block Ductile iron Steel Cast CA ) aluminium Cast stainless Stainless steel Cast SA ) steel AISI aluminium AISI 6 (.454) (.448) Internals Diaphragm Seats Balls NRS B B NBR (Buna N) N N EPDM (Nordel) E E EPDM (high press.) D EPDM (grey) G G FKM (Viton) F F PTFE (Teflon) T T T Stainless steel R NBR, steel core Y EPDM, steel core W EPDM, grey with steel core X PTFE, steel core Z ) Equipped with safety valve. ) Pumps equipped with PTFE diaphragms, valve balls and valve seats will have considerably reduced suction lift ability. Particle size and suction lifts Pump size Particle size mm Suction lift in mwc dry ) Wetted ) Maximum operation temperature C Metal pumps with internal of NRS 7 of NBR 9 of FKM of PTFE of EPDM 9

9 Performance characteristics of Series M Type DB High Pressure Range Available pump capacity % Example: During the conveyance of a product with a Decrease in pumping rate for viscous liquids viscosity of 6 mpa s, the pumping rate decreses 8 to 6 percent of the rated value, based on water. 6 4, 4, 6, 8,,, 4, 6, 8,,, Viscosity of the transported medium mpa s Decrease in pumping rate % Decrease in pumping rate for specified suction lift Example: With a suction lift of 4 mwc, the pumping rate decreases by about %. This figure varies with different pump configurations mwc Suction head

10 Extremely rugged construction reduces downtime to a minimum. DEPA air operated diagphragm pumps have been designed in such a way that all components in contact with the product can be disassembled and reassembled within a few minutes. This means that servicing work is reduced to the absolute minimum. DEPA air operated diaphragm pumps have been developed as a modular system. Consequently, many components some of which are common to all versions are mutually compatible and interchangeable. This flexible construction allows quick and simple changing of the internals for all Type DB models, to fulfil different applications. SA Pump weight in kg Pump size Housing type CA SA Dimensions for DB sizes F N Discharge Size DB 5 DB 4 DB 5 A 9 8 B 6 4 C A B E C D K F G H J L M Air connection Suction D E F G H J K 55 4 L M N Dimensions in mm All information published here is subject to change without notice.

11 DEPA Air Driven Diaphragm Pumps Series DP 5-5 Powder Pumps DEPA Series DP pumps are manufactured in three sizes, in a variety of materials such as polished stainless steel, aluminium and cast iron, to suit a variety of applications for powder conveying. These pumps employ the well established operating principle of DEPA air operated diaphragm pumps. The DP5 model, with a flow rate up to 4 kg/h, is the largest air operated diaphragm pump in the world. In developing the optimum DEPA pump to fulfil the requirements of powder transfer, the suction and discharge manifolds of the DP Series have been designed with a Y configuration in order to minimise bends and curves and provide as smooth a flowpath as possible. This arrangement takes up more space than the standard DEPA manifold design but makes a dramatic improvement to the flow characteristics of the powder through the pump. All DP Series pumps have connections that allow fluidising equipment such as aeration valves to be used. When pumping product from open containers, a suction lance is normally attached to the suction hose to allow fluidisation of the product. To ensure long term dependable operation, the product should be properly fluidised. Granules or crystalline media can only be pumped under certain conditions please check with your DEPA supplier. Bulk density of the powder must not exceed 5 gm/l and the particle size must be under µ (microns). The values given are for guidance only. Under some circumstances, if special precautions are taken, they can be exceeded. Reliable Operation On the suction side, DEPA Series DP air operated diaphragm pumps operate in principle like vacuum cleaners. Then, the product enters the suction chamber and is discharged on the next stroke. DEPA powder pumps are portable and mobile. Low product velocities, compared with other methods of powder pumping, result in gentle product handling. Lower cost and more efficient powder transfer than mechanical methods. Because of the low air to product ratio (typically : to :5), less air need be extracted on the discharge side. DE/DB--GB /.98 / MD

12 I Dimensions Dimensions for all sizes of DEPA Series DP powder pumps. All dimensions in mm. The dimensions are for guidance only and should not be used for installation purposes. Certified dimensions will be supplied on request. Series DP 5 and 8 Type DP 8 SA Discharge Muffler Suction Pump A B D E F G I Suction Side Discharge Side DP R in. R in. DP R in. R in. K B C D E F G I K Suction Side Discharge Side 49 R in. R in. Type DP 5 L See Note A B C D E F G I K L 59 D Suction Side 5mm Discharge Side mm G E F A K B C Note. Muffler option available All information published here is subject to change without notice.

13 DEPA Air Driven Diaphragm Pumps Series P Type DL Non metallic pumps For use with corrosive and abrasive media in chemical processing, electroplating, effluent treatment and similarly arduous applications. DEPA Series P pumps with solid, non metallic components have been developed to transfer a wide span of corrosive liquids, slurries, pastes and sludges for which pumps of metal construction fail to offer the necessary chemical resistance. The pump housings are machined from solid Polypropylene (PP) or Polytetrafluorethylene (PTFE). The elaborate manufacturing process involved ensures the highest possible stability of form and thus the pumping pressure capability is maintained in line with standard DEPA cast metal pump versions. In addition, the solid PP and PTFE form also provides complete external resistance to corrosive environments. Choice of correspondingly stable, corrosion resistant materials is available for the diaphragms, valve balls and valve seats. See page. These pumps can be supplied with connecting flanges conforming to DIN as well as ANSI standards. An electrically conductive plastic pump build also allows transfer of non conductive media in explosive and/or hazardous areas. Electrically conductive, non metallic DEPA pumps can be constructed of both PP and PTFE, providing a surface resistance of less than 6 ohms. The pumps can be electrically earthed. Standard design Features include overall corrosion resistant construction, maintenance free control valve, stainless steel base with integral anti vibration mounts, stainless steel clamp bands, muffler, air intake filter and flange connection for models DL 5 to DL 8. A complete range of accessories simplifies operation and enhances flexibility. Accessories include pulsation dampeners, monitoring and control systems, various transport devices, quick release couplings and adapters. For more information please contact your local agent. Designed for resistance to corrosive media and environments with rugged non metallic construction and components. Ideal also for abrasive, viscous and shear sensitive media, and for products with entrained solids. Air operation plus electrically conductive plastic housing means suitability for explosive or hazardous areas. Tolerance of dry running and harsh usage. Minimal maintenance with no lubrication required. Positive displacement pumping action minimises product shear. Completely enclosed units with no bearings or rotary seals in the product stream. Easy control of flow rate by regulating air supply. No need for electric motors, special drives or base plates. Easily portable and ready to use by simply connecting to air supply. Can be run against a closed discharge a vital benefit for use on filling machines. DE/DB-4-GB /.97 / MD Self priming and submersible.

14 DEPA Air Driven Diaphragm Pumps Series P Type DL Operating Principle Double acting, positive displacement Series P pumps operate with two alternating pumping chambers. The compressed air which drives the unit is admitted through a control valve, to the rear of each diaphragm in turn, so displacing the medium from alternate pumping chambers. In the pump illustrated, the right hand pumping chamber is in the intake position. A vacuum has been created by the retraction of the diaphragm and the pumped medium flows into the chamber. The left hand diaphragm, which is supported by compressed air, simultaneously displaces the medium present in this chamber. Since the two diaphragms are connected by a common piston rod, suction always occurs in one chamber whilst discharge is occuring in the other. Materials of construction available DL 4 PP E E E Pump size Connections in. ) DN 5 ) 5 Connections in. DN 5 5 Connections in. DN 4 4 Connections in. DN 5 5 Connections in. DN 8 8 ) Polypropylene ) Polytetrafluorethylene ) Flange connection optional Major subassemblies Housing Wetted piston Centre block PP ) PP PP PP PP electr. PP electr. PP electr. conductive conductive conductive PL PTFE ) PTFE PP PT PP electr. PP electr. PP electr. conductive conductive conductive TL Internals Diaphragm Seats Balls NRS B B B NBR (Buna N) N N N EPDM (Nordel) E E E EPDM (grey) G G FKM (Viton) F F PTFE (Teflon) T T T Stainless steel R NBR, steel core Y EPDM, steel core W EPDM, grey with steel core X PTFE, steel core Z Cone valve, EPDM E I Particle sizes and suction lifts Pump size Particle size in mm Suction lift in m WC dry 5) Wetted ) For pumps equipped with valve seats and valve balls of PTFE and those with cone valves, a decrease in suction lift must be expected. Pump weight in kg Maximum operating temperature C PP pumps PP 6 PTFE pumps with internals of NRS 8 NBR, EPDM FKM 4 PTFE Housing type PP PL PT TL Pump size

15 Performance characteristics of Series P Type DL non metallic models SCFM bar Air consumption..4.8 Nm /min. DL 5 Performance at 7 bar air supply pressure SCFM bar Air consumption Nm /min DL 5 Performance at 7 bar air supply pressure Total discharge head Total discharge head SCFM bar Air consumption Nm /min. DL 4 Performance at 7 bar air supply pressure SCFM bar Air consumption Nm /min. DL 5 Performance at 7 bar air supply pressure Total discharge head Total discharge head SCFM bar Air Consumption Nm /min. DL 8 Performance at 7 bar air supply pressure Example: To help you select the correct pump size Required pump rate is 4 m /h and required total discharge head is m. The correct selection in DL 5, the required air pressure is 5 bar and the air consumption is.5 Nm /min. Total discharge head The indicated pumping rates are based on water. Available pump capacity Decrease in pumping rate % Example: During the conveyance of a product with a Decrease in pumping rate for viscous liquids viscosity of 6 mpa s, the pumping rate decreses 8 to 6 percent of the rated value, based on water. 6 4, 4, 6, 8,,, 4, 6, 8,,, Viscosity of the transported medium mpa s/cp % Decrease in pumping rate for specified suction lift Example: With a suction lift of 4 mwc, the pumping rate decreases by about %. This figure varies with different pump configurations mwc Suction head

16 Extremely rugged construction reduces downtime to a minimum. DEPA pumps have been designed in such a way that all components in contact with the product can be disassembled and reassembled within a few minutes. This means that servicing work is reduced to the absolute minimum. DEPA air driven diaphragm pumps have been developed as a modular system. Consequently, many components some of which are common to all versions are mutually compatible and interchangeable. This flexible construction allows quick and simple changing of the internals for all Type DL models, to fulfil different applications. Dimensions for all non metallic models Discharge Air connection Suction Size 5 4) A B C D E F G I K Air connection 4in. 8in. 8in. 4 in. 4 in. 4) Dimensions without flange There is a DEPA diaphragm pump for practically every liquid that flows. DEPA air driven diaphragm pumps are available in three different basic constructions: cast metal, solid plastic and highly polished stainless steel (CIP compatible). Special purpose designed models are available for powders, high pressures up to bar and drum pumping of hard-to-handle drum contents. For more information please contact your local supplier. All information published here is subject to change without notice.

17 DEPA Air Operated Diaphragm Pumps Series P Plastic Pumps Type DL5-PM, DL5-PM, DL4-PM The new pump generation PM is a further development of DEPA s proven and successful polypropylene pumps series. The development offers a combination of modern industrial design combined with the daily requirements of pumps, like temperature, chemical resistance and high mechanical strength. The computer-aided design of the injection moulding achieves a consistant high quality with excellent surface finish for low flow resistance and good abrasion resistance. The result of the new design offers a strong and compact type of construction. These new DEPA pumps have all the advantages of Air Operated Diaphragm pumps, dry running, selfpriming, gentle product handling and the ability to stall against closed discharge lines. Various options allow a wide variety of applications for the pumps. Internal and external air valves, ANSI, DIN and JIS flanges and screw connections are available. For the product wetted parts (diaphragms, valve seats and valve balls) there are several elastomer materials available. Flow rate max. 9 m /h at max. 7 bar. DE/DB-5-GB / 9. / MD

18 DEPA Air Operated Diaphragm Pumps Series P Plastic Pump Type DL5-PM Technical Specification Product wetted parts Housing material: Elastomer material: Suction and discharge connection: PPH injection moulded NRS, NBR, EPDM, FKM, PTFE for diaphragms, valve seats, balls R, female thread Non-wetted parts Centreblock material: PP Air valve internal: brass, brass nickel plated Product temperature max.: 6 C Suction lift max.:.5 m Solid size max.:.5 mm Pump weight:.5 kg Flow rate:, m /h at 7 bar max. Performance curves Pressure head in bar Air pressure 7 bar / PSI 6 bar / 86 PSI 5 bar / 7 PSI 4 bar / 57 PSI bar / 4 PSI bar / 9 PSI Air consumption in Nm /min Air pressure 7 bar / PSI bar / 9 PSI 6 bar / 86 PSI 5 bar / 7 PSI 4 bar / 57 PSI bar / 4 PSI Flow rate in m /h Flow rate in m /h Dimension drawing C D E H J (Standard) Dimensions in mm A 7,5 B,5 C 6, D 85, E 65, F,5 G 4,5 H 4, J 55, K 8, L 55,

19 DEPA Air Operated Diaphragm Pumps Series P Plastic Pump Type DL5-PM Performance curves Pressure head in bar Air pressure 7 bar / PSI 6 bar / 86 PSI 5 bar / 7 PSI 4 bar / 57 PSI bar / 4 PSI bar / 9 PSI Technical Specification Product wetted parts Housing material: Elastomer material: PPH injection moulded NRS, NBR, EPDM, FKM, PTFE for diaphragms, valve seats, balls Suction and discharge connection: Standard PVC-Loose flange DN 5 DIN 65, special options Combined DIN/ANSI, ANSI-, JIS-Flange or R female thread Non-wetted parts Centreblock material: PP Air valve internal: brass, brass nickel plated Air valve external: coated Clamp band:.4 Product temperature max.: 6 C Suction lift max.: 4 m Solid size max.: 4 mm Pump weight: 8.4 kg Flow rate: 6,6 m /h at 7 bar max. Air consumption in Nm /min Air pressure 7 bar / PSI bar / 9 PSI 6 bar / 86 PSI 5 bar / 7 PSI 4 bar / 57 PSI bar / 4 PSI Flow rate in m /h Flow rate in m /h Dimension drawing L (Standard) Dimensions in mm A 64 B 87 C 5 D 85 E 7 F 5 G 84 H 44 J 4 K 88 L 8 M 84 N 85

20 DEPA Air Operated Diaphragm Pumps Series P Plastic Pump Type DL4-PM Performance curves Pressure head in bar Air pressure 7 bar / PSI 6 bar / 86 PSI 5 bar / 7 PSI 4 bar / 57 PSI bar / 4 PSI bar / 9 PSI Technical Specification Product wetted parts Housing material: Elastomer material: PPH NRS, NBR, EPDM, FKM, PTFE for diaphragms, valve seats and balls Suction and discharge connection: Standard PVC-Loose flange DN 4 DIN 65, special options Combined DIN/ANSI, ANSI-, JIS-Flange or R female thread Non-wetted parts Centreblock-material: PP Air valve internal: brass, brass nickel plated Air valve external: coated Clamp band:.4 Product temperature max.: 6 C Suction lift max.: 5.5 m Solid size max.: 6 mm Pump weight: 5. kg Flow rate: 9 m /h at 7 bar max. Air consumption in Nm /min Air pressure 7 bar / PSI 6 bar / 86 PSI 5 bar / 7 PSI 4 bar / 57 PSI bar / 4 PSI bar / 9 PSI Flow rate in m /h Dimension drawing Flow rate in m /h (Curves based on water [cps] ambient temp. and air supply 7 bar) 8 L (Standard) Dimensions in mm A 5 B 67 C 5 D E 49 F 5 G 4 H 9 J 4 K 45 L 65 M 9 N 94 Technical changes can be carried out without any further comment

21 DEPA Air Driven Diaphragm Pumps Series L Type DH Highly Polished Stainless Steel Pumps (USDA Approved) For hygienic pumping duties throughout food, beverage, pharmaceutical, biotechnology and cosmetic manufacturing processes. DEPA Series L, Type DH Pumps are suitable for chemical cleaning in place (CIP) or steam sterilisation in place (SIP). They are designed for transfer of abrasive, viscous or shear sensitive media, including products with entrained solids and require minimal maintenance. Because of the low shear, positive displacement pumping action, delicate products including entire chunks of fruit, vegetables and meat can be transported without damage. This gentle action also avoids excessive wear on pump internal components. These pumps use oilfree air and require no oil or grease lubrication, so obviating any risk of product contamination by lubricants. Incorporation of the widely used, threaded milk connections (DIN 85) ensures that the pumps can be quickly and easily dismantled for visual inspection. Choice can be made from a variety of construction materials for the internal diaphragms and valve balls, to meet exact requirements. See page. DEPA Series L Type DH pumps are manufactured in four sizes with connections: DIN5 to DN5. The option of DIN 85 Tri-clamp, SMS etc., is also available. Standard design Overall corrosion resistant construction incorporates all metallic, product wetted parts in 6 stainless steel. Other features include maintenance free control valve, stainless steel base with integral anti vibration mounts, muffler and air intake filter for sizes 5 to 5. Accessories A complete range of accessories simplifies operation and enhances flexibility. They include pulsation dampeners, monitoring and control systems, various transport devices, quick release couplings, adapters etc. For more information, please contact your local supplier. Designed for hygienic processes with highly polished stainless steel construction, CIP and SIP compatibility and easy manual cleaning. Use of oil-free air obviates any risk of product contamination. Ideal for abrasive, viscous and shear sensitive media, and for products with entrained solids. Tolerance of dry running and harsh usage. Minimal maintenance with no lubrication required. Gentle positive displacement pumping action minimises product shear. Completely enclosed units with no bearings or rotary seals in the product stream. Air operation means suitability for explosive or hazardous areas. Easy control of flow rate by regulating air supply. No need for electric motors, special drives or base plates. Easily portable and ready to use by simply connecting to air supply. Can be run against a closed discharge a vital benefit for use on filling machines. Self priming and submersible. DE/DB-7-GB / 9. / MD

22 DEPA Air Driven Diaphragm Pumps Series L Type DH Operating Principle Double acting, positive displacement Series L pumps operate with two alternating pumping chambers. The compressed air which drives the unit is admitted through a control valve to the rear of each diaphragm in turn, so displacing the medium from alternate pumping chambers. In the pump illustrated, the left hand pumping chamber is in the intake position. A vacuum has been created by the retraction of the diaphragm and the pumped medium flows into the chamber. The right hand diaphragm, which is supported by compressed air, simultaneously displaces the medium present in this chamber. Since the two diaphragms are connected by a common piston rod, suction always occurs in one chamber whilst discharge is occurring in the other. Process side Air side Series Materials of construction available as standard series: Polished stainless steel DH USDA approved DH 4 UL U G ) Pump size Connections in. Tri-Clamp 5 Connections in. Tri-Clamp 5 Connections in. Tri-Clamp 4 Connections in. Tri-Clamp 5 Major subassemblies Housing Wetted piston Centre block Polished Polished Chromium UL stainless stainless plated ) steel steel cast bronze AISI 6 AISI 6 (.457) (.457) ) Series L Type DH has been reviewed and accepted by the Dairy Grading Branch, USDA for use in dairy plants surveyed and approved for USDA grading service. ) Models wit externally mounted air valves, aluminium chromium plated except DL5, stainless steel. ) Other ball materials are available on request. Internals ) Diaphragm Seats Balls EPDM gray for DH range U PTFE for Series DH P Stainless steel R EPDM grey with steel core X PTFE steelcore Z NRS B Particle size and suction lift Pump size Particle size mm Suction lift in mwc dry 4) Wetted Maximum operating temperature C Highly polished stainless steel pumps with internal components: NBR, EPDM FKM 4 PTFE 4) For pumps equipped with diaphragms and valve balls of PTFE a decrease in suction lift must be excepted. Pump weight in kg Housing type DH-UL Pump size

23 Performance characteristics of Series L Type DH Highly polished stainless steel models Example: To help you select the correct pump size: Required pump rate is 4 m per hour, required total discharge head 5 metres. The correct selection is DH4, the required air pressure 6. bar and the air consumption is.5 Nm /min. The indicated pumping rates are based on water. Available pump capacity % Example: During the conveyance of a product with a Decrease in pumping rate for viscous liquids viscosity of 6 mpa s, the pumping rate decreses 8 to 6 percent of the rated value, based on water. 6 4, 4, 6, 8,,, 4, 6, 8,,, Viscosity of the transported medium mpa s/cp Decrease in pumping rate % Decrease in pumping rate for specified suction lift Example: With a suction lift of 4 mwc, the pumping rate decreases by about %. This figure varies with different pump configurations mwc Suction head

24 Extremely rugged construction reduces downtime to a minimum. DEPA pumps have been designed in such a way that all components in contact with the product can be disassembled and reassembled within a few minutes. This means that servicing work is reduced to the absolute minimum. DEPA air driven diaphragm pumps have been developed as a modular system. Consequently, many components some of which are common to all versions are mutually compatible and interchangeable. This flexible construction allows quick and simple changing of the internals for all Type DH models, to fulfil different applications. Dimensions for all sizes Discharge Air connection Suction Size B C D E F G I K Air connection R 4in. R 8in. R 8in. R 4in. Dimensions in mm There is a DEPA diaphragm pump for practically every liquid that flows. DEPA air driven diaphragm pumps are available in three different basic constructions: cast metal, solid plastic and highly polished stainless steel (CIP compatible). Special purpose designed models are available for powders, high pressures up to bar and drum pumping of hard-to-handle drum contents. For more information please contact your local supplier. All information published here is subject to change without notice.