700 SIGMA SERIES ENGINEERING DATA

Transcription

1 700 SIGMA SERIES ENGINEERING DATA

2 CONTENT 700 SIGMA EN/ES SIGMA EN/ES 2 Exploded View 3 Material Specifications 4 Principle of Operation 5 Plug Options 6 Cavitation 7 Cavitation Cage SIGMA EN 9-10 Technical Data 9 Dimensions & Weights 9 Flow Factors 9 Flow Chart SIGMA ES Technical Data 11 Dimensions & Weights 11 Flow Factors 11 Flow Chart SIGMA EN/ES Additional Valve Options and Features 13 International Standards 17 1

3 700 SIGMA EN/ES BERMAD 700 SIGMA EN/ES series are hydraulically operated, oblique pattern control valves with high cavitation resistance, excellent flow capacity and double chamber unitized actuator, that can be disassembled from the body as a separate integral unit. The valves hydrodynamic body is designed for unobstructed flow path and provides excellent and highly effective modulation capacity for high differential pressure applications, with minimal noise and vibrations. The 700 SIGMA EN/ES series meet all flange connection standards. 700 SIGMA EN Full port valve with extraordinarily high flow capacity enabling optimized used of resources and minimizing energy costs. 700 SIGMA ES - Designed mainly for regulating applications achieving the best performance under veriable flow velocities in pipes. 700 Sigma EN 700 Sigma ES Features and Options Double-Chambered Actuator Actuator assembly can be removed as one integral unit. Simple on-site conversion from Single to Double chambered actuator or vice versa. Wide Body-Oblique Y pattern design Hydro-dynamically designed for efficient flow with minimal pressure loss and excellent resistance to cavitation. Valve port area clear of obstructions; no ribs or stem guides. Increases capacity by 25% over standard globe valves. Diaphragm Assembly The flexible, flat fabric reinforced diaphragm is supported over the majority of its surface. Diaphragm load is limited to only the stretching forces applied to the active area. Diaphragm is fully protected by the separtation partition from stones, wood and debris. Valves are suitable to work with all types of command: Hydraulic, Electric and Pneumatic. Self operated valves that can work without an external source of power. Wide range of options: One-way or two-way flow direction V-Port Cavitation cages (Single or Double) Visual position indicator Limit switches Analog opening output Large selection of control accessories 2

4 Exploded View Lifting eye nut Cover bolt & disc Cover plug O-ring Indicator nut Shaft nut Diaphragm Diaphragm washer Cover Diaphragm washer O-ring Spacer disc Shaft Separation partition Lifting eye bolt Cover nut & disc Spring Seal disc O-ring Bearing screw O-ring Bearing O-rings Stud O-ring O-ring Seal Seal disc screws Seat O-ring Locking ring Shaft locking nut Seal disc washer V-port throttling plug - option Seat screw Nut & disc Valve body Control hub Control hub 3

5 Material Specifications [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] Item Number Description Material (Standard) * Material (Drinking Water) * 1 Indicator Assembly (optional) Stainless steel 2 Cover Fusion bonded Epoxy Coated Ductile Iron, EN 1563 or ASTM A Diaphragm washer Epoxy Coated Steel 4 Diaphragm Fabric-reinforced NBR Fabric-reinforced EPDM 5 Separating Partition Fusion bonded Epoxy Coated Ductile Iron, EN 1563 or ASTM A Bearing Bronze Tin Bronze 7 Shaft Stainless Steel, AISI Spring Stainless Steel, AISI Seal Disc Stainless Steel, AISI Seal NBR EPDM / NBR 11 Seat Stainless Steel, AISI V-Port Tin Bronze, Stainless Steel 316 Flat Disc Stainless Steel, AISI Valve Body Fusion bonded Epoxy Coated Ductile Iron, EN 1563 or ASTM A-536 O-Rings NBR EPDM Internal Bolts Stainless Steel, AISI 316/304 External Bolts, Studs, Nuts & Disks Stainless Steel, AISI 316 * Other Metirials Available on Reqesut 4

6 Principle of Operation On-Off Modes Principle of Operation Principle of Operation On-Off Modes On-Off Modes Closed Position Closed PositionLine pressure applied to the upper control chamber of the Line pressure applied to the upper valve creates a superior force control chamber that of moves the the valve to creates the a superior force that closed position moves and the provides valve to drip-tight sealing. the closed position and provides drip-tight sealing 3-Way Modulating Mode - Pressure Reducing Closed Position Open Position Closed PositionOpen Position Powered Open Open Position Position Powered Open Position Powered Open Position Line pressure Discharging applied Open to the Position Line pressure pressure in applied Discharging to the the Line pressure in is Discharging applied to the Line pressure pressure in is applied to upper control the chamber upper control of the upper chamber control to chamber the upper of control the the lower chamber control the to chamber upper control as the chamber lower control to chamber as Discharging the pressure in the upper valve creates atmosphere a superior force valve some creates other a atmosphere superior force pressure some in other atmosphere upper control or pressure some other in the upper control that moves the lower valve control pressure to the that zone chamber moves causes the the lower to valve atmosphere pressure to the chamber zone causes is vented. or lower some the This, pressure chamber zone causes is vented. the This, closed position line and pressure other provides acting lower closed on position pressure the sealdisk to move the drip-tight valve to sealing. the disk to move acting the valve on the to the seal-disk, to move creates the acting valve on to the seal-disk, creates line and pressure provides zone together acting causes on with the the line seal- line pressure pressure acting together on the with seal- the line pressure drip-tight sealing. line pressure acting on seal-disk open position. open position. a force that powers open the position. valve a to force that powers the valve to move the valve to the open the open position. the open position. Modulating Mode Pressure Reducing Modulating Mode Pressure Reducing Powered Open Position Line pressure is applied to the lower control chamber as Line pressure is applied to the lower pressure in the upper control control chamber chamber as pressure is vented. This, in the upper control chamber together with is the vented. line pressure This, acting on the seal-disk, creates together with the line pressure acting a force that powers the valve to on the seal-disk, the creates open position. a force that powers the valve to the open position. Principle of Operation Principle of Operation Principle of Operation On-Off Modes On-Off Modes On-Off Modes Closed Position Closed Position Modulating Position Closed PositionModulating Position Open Position Modulating Position Open Position Open Position The closed adjustable pilot valve The closed adjustable The pilot valve pilot valve The senses closed line adjustable The pilot pilot valve valve The senses open pilot line The valve pilot releases valve The senses open line pilot valve releases The open pilot valve releases traps line pressure in the upper traps line pressure in the changes upper traps and line opens pressure or pressure in the changes upper line pressure and opens from pressure or the upper changes line and pressure opens from or the upper line pressure from the upper control chamber. The resulting control chamber. closes The accordingly. resulting control It controls chamber. the closes The resulting accordingly. control It chamber. controls closes the accordingly. control It controls chamber. the control chamber. superior force moves the valve superior force accumulated moves the pressure valve superior in force the valve moves accumulated the valve The pressure line pressure in the accumulated valve acting on both pressure The line in pressure the valve acting on The both line pressure acting on both to the fully closed upper position control chamber, and causing the lower control upper chamber control and chamber, the lower causing control chamber and provides drip-tight main valve sealing. to modulate to an the seal-disk, moves main valve the valve to modulate the seal-disk, to an moves the valve intermediate position and maintain intermediate position to the open and maintain position. the preset pressure value. the preset pressure value. Closed Position to the fully closed position and The pilot responds provides to drip-tight high downstream sealing. pressure and introduces upstream pressure to the upper control chamber. The Double Chamber configuration ensures powered Closed Position closing at zero flow. Line pressure applied to the upper control chamber of the valve creates a superior force that moves the valve to the closed position and provides drip-tight sealing. open position. 2-Way Modulating Mode - Pressure Reducing Modulating Mode Pressure Reducing Modulating Position to the fully closed upper position control and chamber, causing When provides the downstream drip-tight main sealing. valve to pressure modulate to is an equal to setting, intermediate the plunger to position the open in and the position. maintain the preset pressure value. pilot valve moves to block all passages and freezes the valve. The pilot valve responds Closed Position to downstream Open Position Powered Open pressure Position Open Position Line is applied to changes Line pressure and moves Discharging applied to the pressure valve in to upper control the chamber upper the of control the lower chamber control chamber to as maintain valve creates the setting atmosphere a superior pressure force by some either in other upper venting control or pressurizing that moves the lower valve control pressure to chamber the zone chamber. is vented. causes This, the Open Position the lower control chamber and When downstream the seal-disk, pressure moves is the lower valve than the setting, to the open plunger position. in the pilot valve moves to vent the pressure from the control chamber, allowing the valve to fully open. This Powered 11 minimizes Open Position pressure 11 loss and ensures Line maximum pressure is applied possible to the lower control chamber as downstream pressure. pressure in the The upper 3-way control control on the Double chamber Chambered is vented. valves This, avoids the risk of a hydraulic together with lockout. the line pressure Closed Position Open Position Line pressure Discharging applied the to the pressure in upper control the upper chamber control of the chamber to valve creates atmosphere a superior some force other that moves lower the pressure valve to zone the causes the Powered Open Position Discharging the Line pressure in is applied to the upper control the lower chamber control to chamber as atmosphere or pressure some other in the upper control lower pressure chamber zone causes is vented. the This, closed position line pressure and provides acting closed on the position sealdisk line and pressure provides together acting with on the seal- line pressure acting together on with the seal- the line pressure sealing. to move the valve drip-tight to the sealing. disk to move acting the on valve the seal-disk, to the creates to move the acting valve on to the the seal-disk, creates acting on the seal-disk, creates drip-tight open position. a force that powers open the valve position. to a force that powers the valve a to force that powers the valve to the open position. the open position. the open position. Modulating Mode Pressure Reducing Modulating Mode Pressure Reducing Closed Position Closed Position The closed adjustable pilot valve The closed traps adjustable line pressure in pilot the upper valve traps control chamber. The resulting line pressure in the upper control superior force moves the valve chamber. to The the fully resulting closed position superior and force moves the provides valve drip-tight to the sealing. fully closed position and provides drip-tight sealing. Closed Position Modulating PositionClosed Position Modulating Open Position The closed The adjustable pilot valve pilot senses valve line traps line pressure changes in the upper and opens or control chamber. closes accordingly. The resulting It controls the superior force accumulated moves the pressure valve in the valve to the fully upper closed control position chamber, and causing provides main drip-tight valve sealing. to modulate to an intermediate position and maintain the preset pressure value. Modulating The closed adjustable Position The pilot pilot The valve open valve senses pilot line valve releases The pilot traps line valve pressure pressure senses in the line changes upper pressure line and pressure from opens the or upper control chamber. closes The accordingly. resulting control chamber. It controls the changes and opens or closes superior force accumulated moves the The valve line pressure pressure in the acting valve on both accordingly. to the fully closed It upper controls position the lower and the chamber, control accumulated causing chamber and pressure provides in drip-tight the main sealing. valve the to upper seal-disk, modulate moves control to an the valve intermediate to the position open position. and maintain chamber, causing main valve to the preset pressure value. modulate to an intermediate position and maintain the preset pressure value. Modulating Position Open Position Open Position The pilot valve The senses open line pilot valve releases pressure changes line pressure and opens from or the upper closes accordingly. control It controls chamber. the accumulated pressure The line pressure in the valve acting on both upper control the chamber, lower causing control chamber and main valve to the modulate seal-disk, to an moves the valve intermediate position to the open and position. maintain the preset pressure value. 11 Open PositionThe open pilot valve releases The open pilot line valve pressure releases from the line upper control chamber. pressure from the upper control chamber. The line pressure acting on both The line pressure the lower acting control on chamber both the and lower control chamber the seal-disk, and moves the seal-disk, valve to the open position. moves the valve to the open position

7 Plug Options BERMAD s 700 SIGMA EN/ ES series has various plug options to enable different valve characteristics. Flat plug - standard plug for on-off and high flow applications. V-Port plug - uniquely designed throttling plug. It changes the ratio of flow to stem travel allowing very wide flow range with relatively high pressure reduction and provides more accurate, stable and smoother response during pressure and flow regulation, while reducing noise and vibration. BERMAD s 700 SIGMA EN/ ES series plugs can easily be change before or after valve installation on site Valve Plugs Characteristics Valve Travel % Kv; Cv % Flat V-port 6

8 Cavitation The cavitation phenomenon has a significant affect on control valve and system performance. When the fluid s static pressure reaches liquid vapor pressure, vapor cavities (bubbles) form and grow until they violently implode by the recovered pressure downstream to the valve seat. The implosion of these cavities generates high-pressure surges, micro jets and intensive heat, which erode valve components and downstream piping. In its final stage, cavitation flashes and chokes the flow. The Cavitation Guide is based on the formula commonly used in the valve industry: Cavitation Charts 700 SIGMA EN US DownStream Pressure (PSI - g) * 15 ft/s 12 ft/s 9 ft/s 6 ft/s 3 ft/s UpStream Pressure (PSI - g) 700 SIGMA EN Metric DownStream Pressure (bar - g) * 5 m/s 4 m/s 3 m/s 2 m/s 1 m/s Cavitation Damage Conditions Cavitation Damage Conditions UpStream Pressure (bar - g) * Consider back pressure orifice, or consult BERMAD Charts represent Flat plug = (P2-Pv) / (P1-P2) Where: = Sigma, cavitation index, dimensionless P1 = Upstream pressure, absolute P2 = Downstream pressure, absolute Pv = Liquid vapor pressure, absolute (Water, 18 C = 0.02 bar-a ; 65 F = 0.3 psi-a) Notes: 1. An alternate cavitation index formula introduced by ISA is: ISA = (P1-Pv) / (P1-P2) which equals The below charts should be considered only as a general guide. 3. For optimum system and control valve application please consult Bermad. 700 SIGMA ES US DownStream Pressure (PSI - g) * 15 ft/s 12 ft/s 9 ft/s 6 ft/s 3 ft/s Cavitation Damage Conditions UpStream Pressure (PSI - g) 700 SIGMA ES Metric DownStream Pressure (bar - g) * 5 m/s 4 m/s 3 m/s 2 m/s 1 m/s Cavitation Damage Conditions UpStream Pressure (bar - g) 7

9 Cavitation Cage Single Cavitation Cage - C1 The BERMAD Single Cavitation Cage trim is designed to reduce cavitation, noise and vibration under higher differential pressure operation, as well as smart pressure reducing. Double Cavitation Cage - C2 The BERMAD Double Cavitation Cage trim is designed to resist cavitation, cavitation damage, noise and vibration under extreme differential pressure operation, as well as smart pressure reducing. Valve Cage Characteristics Valve Travel % Kv; Cv % Single Cage double Cage 8

10 700 SIGMA EN Technical Data Valve Patterns: Y (Globe) Pressure Rating: 25 bar; 400 psi End Connections: Flanged (all standards) Plug Types: Flat disc, V-port, Cavitation cages Temperature Rating: 60 C; 140 F for Cold water applications. Optional higher temperature: Available on request ES Standard Materials: Body & actuator: Ductile Iron Bolts, nuts & studs: Stainless Steel Internals: Stainless Steel, Bronze & Coated Steel Diaphragm: Fabric-reinforced synthetic rubber Seals: Synthetic rubber Coating: Dark blue Fusion bonded epoxy For other materials contact BERMAD. b c G Dimensions & Weights EN H a L h W Size inch 1.5" 2" 2.5" 3" 4" 6" 8" 10" 12" 16" mm L inch mm W inch mm h* inch mm H* inch mm Weight* lbs kg Control Gallons Chamber Volume Litres Valve travel inch mm a inch 3/8 NPT 1/2 NPT 1 BSP b inch 1/8 NPT 1/4 NPT 3/8 NPT 3/4 BSP c inch 1/4 NPT 1/2 NPT 3/4 BSP G inch 3/4 G 2 G 3 G * Maximum Dimensions Flow Factors Size Flat Disc V-Port inch 1.5'' 2" 2.5" 3" 4" 6" 8" 10" 12" 16" mm Cv Kv K Cv Kv K

11 Flow Chart US Units Pressure Loss- psi Metric Rate of Flow- gpm Pressure Loss- bar Rate of Flow- m 3 /h * Charts represents fully open valves. Use BERMAD Sizing program for proper valve sizing. Differential Pressure & Flow Calculation Q Cv= P Q=Cv* P Q P= ( ) 2 Cv Q Kv= P Q=Kv* P Q P= ( ) 2 Kv Cv = Valve flow coefficient (flow in gpm at P=1psi) Q = Flow rate (gpm) P = Differential pressure (psi) Kv = * Cv Kv = Valve flow coefficient (flow in m3/h at P=1bar) Q = Flow rate (m3/h) P = Differential pressure (bar) Cv = * Kv 10

12 700 SIGMA ES Technical Data Valve Patterns: Y (Globe) Pressure Rating: 25 bar; 400 psi End Connections: Flanged (all standard) Plug Types: Flat disc, V-port, Cavitation cages Temperature Rating: 60 C; 140 F for Cold water applications. Optional higher temperature: Available on request Bolts, nuts & studs: Stainless Steel Internals: Stainless Steel, Tin Bronze & Coated Steel Diaphragm: Fabric-reinforced synthetic rubber Seals: Synthetic rubber Coating: Dark blue Fusion bonded epoxy For other materials contact BERMAD. Standard Materials: Body & actuator: Ductile Iron b c G Dimensions & Weights a Size inch 2.5" 3" 4" 5'' 6" 8" 10" 12" 14" 16" 18" 20" 24" mm L inch mm W inch mm h* inch mm H* inch mm Weight* lbs kg Control Gallons Chamber Volume Litres Valve inch Travel mm a inch 3/8 NPT 1/2 NPT 1 BSP b inch 1/8 NPT 1/4 NPT 3/8 NPT 3/4 BSP c inch 1/4 NPT 1/2 NPT 3/4 BSP G inch 3/4 G 2 G 3 G * Maximum Dimensions ** For 24, the dimensions is without the sizes of cradle Flow Factors Size Flat Disc V-Port inch 2.5" 3" 4" 5'' 6" 8" 10" 12" 14" 16" 18" 20" 24" mm Cv Kv K Cv Kv K

13 Flow Chart US Units 15 Pressure Loss- PSI , 20, Rate of Flow- gpm Metric Pressure Loss- bar , 500, Rate of Flow- m 3 /h * Charts represents fully open valves. Use BERMAD Sizing program for proper valve sizing. Differential Pressure & Flow Calculation Q Cv= P Q=Cv* P Q P= ( ) 2 Cv Q Kv= P Q=Kv* P Q P= ( ) 2 Kv Cv = Valve flow coefficient (flow in gpm at P=1psi) Q = Flow rate (gpm) P = Differential pressure (psi) Kv = * Cv Kv = Valve flow coefficient (flow in m3/h at P=1bar) Q = Flow rate (m3/h) P = Differential pressure (bar) Cv = * Kv 12

14 700 SIGMA EN/ES Additional Valve Options and Features Independent Lift Check - 2S The BERMAD Independent Lift Check feature is an integral, lift type, spring loaded non return trim that allow full control and regulation in the required direction and smoothly closes drip tight before flow changes direction, regardless of control status. Back-up Safety - TC The BERMAD Back-up Safety feature is a Triple Chamber actuated valve, where the third control chamber enables a failsafe mechanism and is recommended in critical or sensitive water systems to ensure continuous operation of the system. Insertion Flow Meter - MT The BERMAD Insertion Flow Meter can be inserted into the upstream side of the 700-Sigma EN/ES valves, adding accurate flow measurement function. 13

15 Valve Position Indicator - I The BERMAD Valve Position Indicator Assembly provides a visual indication of valve opening and regulation behavior. Single Limit Switch - S The BERMAD Single Limit Switch Assembly includes mechanical electrical change over contacts (NO + NC), enabling remote signaling of the closed valve position. Double Limit Switch - SS The BERMAD Double Limit Switch Assembly includes two mechanical electrical switches, enabling remote signaling of the closed and the open valve positions. 14

16 Flow Stem - M The BERMAD Flow Stem Assembly enables limiting the opening stroke of the control valve or for safety ensured mechanical closure. Lifting Spring - L The BERMAD Lifting Spring Assembly enables the valve to remain open at zero pressure conditions and to minimize pressure losses. Analog Valve Position Transmitter - Q The BERMAD Analog Valve Position Transmitter Assembly enables remote signaling of the valve s relative position. 15

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18 TYPE APPR O VED TYPE APPR O VED TYPE APPROVED TYPE APPROVED ISO ISO International Standards ISO ISO ISO INTERNATIONAL ISO Certified Quality Assurance System ISO 9001 INTERNATIONAL ISO Certified Quality Assurance System WRAS, UK DVGW, Germany TA TA The product complies with the Water Regulation Advisory Scheme of UK and BS 6920 Compliance with the European Standard EN 1074 Valves for water supply and German Standards KTW and W270 ACS, France NFPA NFPA Tests are based on the French Sanitary standard BELGAQUA, Belgium TA TA The product complies with the Belgian Standards for materials in contact with drinking water NSF USA NFPA NFPA CQS CQS The product complies with the NSF/ ANSI 61 Std. Valves for Water Supply and NSF 372 low lead Bulgarcontrola, Bulgaria Compliance of Bermad Automatic Control Valves with the sanitary requirements of Bulgaria and with the EN 1074 European Standard for Valves for Water Supply PZH, Poland CQS CQS Compliance of Bermad Automatic Control Valves with the Polish sanitary requirements AUSTRALIA AS 5081 and water mark Control valves for waterworks purposes RUSSIAN Customs Union Valves For Water Supply KOREA Valves For Water Supply BERMAD valves comply with a wide range of international standards. Please consult with BERMAD about the compliance of a required model to a specific standard 17

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20 Copyright Bermad CS Ltd. All Rights Reserved. The information contained in this document is subject to change without notice. BERMAD shall not be liable for any errors contained herein.