Basic Valve IR- Yflow Basic Valve Te BERMAD basic Model IR- Yflow diapragm actuated, ydraulically operated valve is at te leading edge of control valve design. It combines simple and reliable construction wit superior performance, wile at te same time being virtually free of te typical limitations associated wit standard control valves. BERMAD s automatic water control valves are designed for vertical or orizontal installation and are available in sizes of 2, 2 1 /2, 3, 4 & 6 ; DN: 50, 65, 80, & 150. Te Model IR- Yflow, made from industrial durable glass-filled nylon, is engineered to meet roug service conditions wit ig cemical and cavitation resistance. Te Yflow Y valve body design includes a full bore seat wit unobstructed flow pat, free of any in-line ribs, supporting cage, or safts. Its unitized Flexible Super Travel (FST) diapragm and guided plug provide a significantly look troug passage from end to end resulting in ultra-ig flow capacity wit minimal pressure loss. Te combination of a long travel guided valve plug, periperally supported diapragm, and replaceable valve seal provides: No cattering or slamming closed Accurate and stable regulation wit smoot motion ow operating pressure requirements No diapragm erosion and distortion Diapragm and spring fully meet te valve's operating pressure range requirements. Designed for service under a wide range of pressure and flow conditions, from dripping to maximum flow, te IR- Yflow excels at being a user-friendly control valve: Simple design wit few parts guarantees easy in-line inspection and service. Adaptable on-site to a wide range of end connection types and sizes. Articulated flange connections isolate te valve from pipeline bending and pressure stresses.
Principle of Operation On-Off Modes 3-ay Control ine pressure applied to te control camber of te valve creates a ydraulic force tat moves te valve to te closed position and provides drip tigt sealing. Discarging pressure from te control camber to te atmospere causes te line pressure under te plug to open te valve. 2-ay Internal Control ine pressure enters te control camber troug te internal restriction. Te closed solenoid causes pressure to accumulate in te control camber, tereby sutting te valve. Opening te Solenoid releases more flow from te control camber tan te restriction can allow in. Tis causes pressure in te control camber to drop, allowing te valve to open. 2-ay Modulating Modes, Pressure Reducing Pilot Modulating to Close ine pressure enters te control camber troug te internal restriction. Te pilot controls outflow from te control camber. Trottling wen it senses a pressure rise, it causes pressure to accumulate in te control camber, tereby forcing te valve to modulate closed. Modulating to Open Te pilot modulates open wen it senses a pressure drop, releasing more flow from te control camber tan te restriction can allow in. Tis causes te accumulated pressure in te control camber to drop and te valve modulates open. Zero Flow Position en demand drops to zero, downstream pressure begins to rise as te flow enters a closed line. Te pilot closes, initiating te valve s irreversible closing process, eventually causing it to seal drip tigt.
Principle of Operation 3-ay Control Modes, Pressure Reducing Fully Open Position en upstream pressure drops, te pilot blocks te supply pressure port and opens te drain port, venting te control camber to te atmospere. Tis fully opens te valve, minimizing ead loss. Modulating to Close Te pilot switces upon pressure rise, blocking te drain port and opening te supply pressure port. Tis pressurizes te control camber, forcing te valve to modulate closed. ocked Position en sensed pressure is equal to setting, te pilot blocks bot te drain and te supply pressure ports. Tis locks te pressure in te control camber, freezing valve opening in its last position until conditions cange. 3/2-ay Control Modes, Pressure Reducing Modulating to Open en pressure drops, te pilot restricts te flow pat troug te supply pressure port, and widens te flow pat troug te drain port. Tis releases more flow from te control camber tan can be allowed in, tereby causing te valve to modulate open. Modulating to Close Upon pressure rise, te pilot widens te flow pat troug te supply pressure port, and restricts te flow pat troug te drain port. Tis allows more flow into te control camber tan can be released, tereby pressurizing it and forcing te valve to modulate closed. Stable Conditions As long as flow and pressure conditions are constant, te pilot freezes te control camber inlet and outlet flow ratio. Tis keeps te valve opening rate constant, allowing te valve to react "on-line" to any anticipated canges in supply and/or demand conditions.
Product Parts Features [1] Cover Ring Te cover ring fastens valve cover to body, stiffening and strengtening te valve body, enabling simple maintenance. A cover ring key is available. [2] "Click-In" Bracket For all BERMAD plastic accessories. [3] Valve Cover Te cover s strong construction meets roug service conditions. Optional cover types (3"; DN80 and smaller valves) are capable of accepting a Flow Stem, a Flow Stem + Position Indicator, and a 2-ay Solenoid (2-N1 Electric Type). [4] Auxiliary Closing Spring One single ig grade stainless steel spring provides a wide operation range, ensuring low opening pressure and secured closing. [5] Plug Assembly Te unitized Flexible Super Travel (FST) plug assembly combines a long travel guided valve plug, periperally supported diapragm, and replaceable diapragm and valve seal. Te diapragm fully meets te valve's operating pressure range requirements. [5.1] Diapragm older [5.2] Diapragm [5.3] Plug [5.4] Plug Seal [1] [2] [3] [6] Yflow Y Valve Body Glass-filled nylon construction meets roug service conditions wit ig cemical and cavitation resistance. End-to-end look-troug design and full bore seat wit unobstructed flow pat, free of any in-line ribs, supporting cage, or safts, enables ultra-ig flow capacity wit minimal pressure loss. [4] [7] End Connections [5] Adaptable on-site to a wide range of end connection types and sizes: [7.1] Flanges: Plastic or metal Corona wit elongated slots enable meeting diverse flange standards ISO, ANSI [7.1] and JIS. [7.2] Flange adaptor external tread [7.3] Internal treads [8] Flange Adapter [7.2] [6] [7.3] [5.1] [5.2] [5.3] [5.4] [7.1] Articulated flange connections isolate te valve from line bending and pressure stresses. [9] Valve egs [8] Stabilizing te valve and serve also as mounting brackets. [9] [8]
Configuration Options Additional Valve Configurations 2"; DN50 2 1 /2"; DN65 - Male Tread (for PVC Adapters) 3"; DN80 3"; DN 80 Angle 6"; DN 150 "Y-Boxer" - Flanged 6"; DN 150 "Y-Boxer" - Grooved (Vic) End Connection Options BSP.T; NPT Female Tread 2"; DN50 BSP.F Male Tread, (for PVC Adapters) 2 1 /2"; DN65 BSP.T; NPT Female Tread 3"; DN80 Union PVC adaptor 2 1 /2"; DN65 Plastic Flange 3"; DN80 Plastic Flange 3" & 4" ; DN: 80 & Metal Flange 3" & 4"; DN: 80 & PVC Adaptor 3" & DN80
Tecnical Data SI Metric Dimensions & eigts End Connections (mm) (mm) (mm) (mm) CCDV (lit) eigt (kg) DN50 Rc 2 230 185 40 1.35 CCDV = Control Camber Displacement Volume DN65 G 2 1 /2 (BSP.F) 230 185 40 1.4 (F) (T) 298 195 50 1.6 (T) (F) DN 80 Metal 308 255 200 4.4 (T) (F) Flanges Plastic 308 255 200 2.5 298 240 60 190 0.7 3.0 (F) (T) DN80 Metal 310 280 200 0.7 5.9 (T) (F) Flanges Plastic 310 280 200 0.7 4.0 (T) (F) Quick orn Outlet Connection DN Flanges Metal Plastic 350 350 294 290 112 112 224 224 0.7 0.7 7.6 4.9 (F) (G) (G) (F) Pattern End Connections (mm) 1 (mm) (mm) (mm) (mm) CCDV (lit) eigt (kg) 1 DN80 Angle 187 130 245 117 1.6 CCDV = Control Camber Displacement Volume *Reinforced Plastic Flanges Grooved (Vic) 480 N/A 195 385 2 x 0.7 8.8 DN150 Y Boxer Flanges* 480 N/A 285 145 385 2 x 0.7 12.5 Pattern Inlet Connection (mm) 1 (mm) (mm) (mm) (mm) CCDV (lit) eigt (kg) 1 Angle 220 165 245 117 1.7 DN 80 1 T 325 245 117 2.1 Tecnical Specifications Available s: DN: 50, 65, 80, 80, & 150 Connections Standard: Treaded: Female BSP-T: DN: 50, 80 & 80 Male BSP-F: DN65 Flanged: DN: 80, 80, & 150 Plastic or metal Corona wit elongated slots enable meeting diverse flange standards ISO PN10, ANSI 125, JIS 10K Pressure Rating: 10 bar Operating Pressure Range: 0.35-10 bar Temperature: ater up to 60 C Standard Materials: Body, Cover and Plug: Glass-Filled Nylon Diapragm: NR, Nylon Fabric Reinforced Seals: NR Spring: Stainless Steel Cover bolts (DN: 50, 65 & 80 valves): Stainless Steel
Flow Data Flow Carts SI Flow Cart Pressure oss - bar 1.0 0.8 0.6 0.5 0.4 0.3 0.15 0.1 0.08 0.06 0.04 0.03 0.02 0.015 Metric Y Pattern DN50-150, Angle Pattern DN80 2-ay circuit "Added ead oss" (for "V" below 2 m/s): 0.3 bar DN50-Y DN80-Y DN80-A DN80 DN DN150 0.01 4 6 8 10 15 20 30 40 60 80 150 200 300 400 Flow Rate (m 3 /) Pressure oss - bar 1.0 0.8 0.6 0.5 0.4 0.3 0.15 0.1 0.08 0.06 0.04 0.03 0.02 0.015 0.01 T Pattern DN80 2-ay circuit "Added ead oss" (for "V" below 2 m/s): 0.3 bar One Side Two Sides 4 6 8 10 15 20 30 40 60 80 150 200 Flow Rate (m 3 /) Flow Properties Y Pattern DN50 DN65 DN80 DN80 DN DN150 Kv 200 200 400 K 1.0 2.8 6.4 1.6 3.9 5.0 eq (m) 2.4 9.1 25.7 6.4 19.6 37.2 A Pattern T Pattern DN80 DN80 6.4 25.7 One Side Two Sides 140 6.4 3.3 25.7 13.1 Valve flow coefficient, Kv or Cv Kv(Cv)=Q ere: Kv = Valve flow coefficient (flow in m 3 / at 1bar Diff. Press.) Cv = Valve flow coefficient (flow in gpm at Diff. Press. 1psi) Q = Flow rate (m 3 / ; gpm) P = Differential pressure (bar ; psi) Gf = iquid specific gravity (ater = 1.0) Kv = 0.865 Cv Gf P Equivalent Pipe engt, eq eq = k D ere: eq= Equivalent nominal pipe lengt (m ; feet) k = Equivalent lengt coefficient for turbulent flow in clean commercial steel pipe (SC 40) D = Nominal pipe diameter (m ; feet) Note: Te eq values given are for general consideration only. K = 2 g Flow resistance or ead loss coefficient, V 2 ere: K = Flow resistance or ead loss coefficient (dimensionless) = ead loss (m ; feet) V = Nominal size flow velocity (m/sec ; feet/sec.) g = Acceleration of gravity (9.81 m/sec 2 ; 32.18 feet/sec 2 )
Tecnical Data US Englis Dimensions & eigts (T) (T) (F) (T) (T) (F) Connections (inc) (inc) (inc) (inc) CCDV (gal) eigt (lb) 2 2 NPT 9 1 /16 7 5 /16 1 9 /16 2.97 2 1 /2 G 2 1 /2 BSP.F 9 1 /16 7 5 /16 1 9 /16 3.08 CCDV = Control Camber Displacement Volume (F) 11 3 /4 7 11 /16 1 15 /16 3.52 (T) (F) 3 Metal 12 1 /8 10 1 /16 7 7 /8 9.68 Flanges Plastic 12 1 /8 10 1 /16 7 7 /8 2.97 11 3 /4 9 7 /16 2 3 /8 7 1 /2 6.60 (F) 3 Metal 12 3 /16 11 7 7 /8 12.98 (T) (F) Flanges Plastic 12 3 /16 11 7 7 /8 8.80 4 Flanges Metal Plastic 13 3 /4 13 3 /4 11 9 /16 11 7 /16 4 7 /16 4 7 /16 8 13 /16 8 13 /16 16.72 10.78 Quick orn Outlet Connection (G) (G) (F) (F) 1 1 1 Pattern End Connections (inc) 1 (inc) (inc) (inc) (inc) CCDV (gal) eigt (lb) 3 Angle 7 3 /8 5 1 /8 9 5 /8 4 5 /8 5 3 /8 3.52 CCDV = Control Camber Displacement Volume *Reinforced Plastic Flanges Grooved (Vic) 18 7 /8 N/A 7 11 /16 15 3 /16 17.71 6 Y Boxer Flanges* 18 7 /8 N/A 11 1 /4 5 11 /16 15 3 /16 27.50 Pattern Inlet Connection (inc) 1 (inc) (inc) (inc) (inc) CCDV (gal) eigt (lb) Angle 8 11 /16 6 1 /2 9 5 /8 4 5 /8 3.37 3 T 12 13 /16 6 1 /2 9 5 /8 4 5 /8 4.62 Tecnical Specifications Available s: 2, 2 1 /2, 3, 3, 4 & 6" Connections Standard: Treaded: Female NPT: 2, 3 & 3" Male BSP-F: 2 1 /2" Flanged: 3, 3, 4 & 6" Plastic or metal Corona wit elongated slots enable meeting diverse flange standards ISO PN10, ANSI 125, JIS 10K Pressure Rating: 145 psi Operating Pressure Range: 5-145 psi Temperature: ater up to 140 F Standard Materials: Body, Cover and Plug: Glass-Filled Nylon Diapragm: NR], Nylon Fabric Reinforced Seals: NR Spring: Stainless Steel Cover bolts (2, 2 1 /2 & 3" valves): Stainless Steel
Flow Data US Englis Flow Cart 10.0 Y Pattern 2-6, Angle Pattern 3 2-ay circuit "Added ead oss" (for "V" below 6.5 f/s): 4.5 psi T Pattern 3 2-ay circuit "Added ead oss" (for "V" below 6.5 f/s): 4.5 psi 10.0 Pressure oss (psi) 1.0 2 -Y 2 1 /2 -Y 3 -A 3 4 6 Pressure oss (psi) 1.0 One Side Two Sides 0.1 10 50 500 0 2000 Flow Rate (gpm) 0.1 10 50 500 0 Flow Rate (gpm) Flow Properties Y Pattern A Pattern T Pattern 3 2 2 1 /2 3 3 4 6 3 One Side Two Sides Cv 115 115 115 230 230 460 115 115 160 K 1.0 2.8 6.4 1.6 3.9 5.0 6.4 6.4 3.3 eq (ft) 8.0 29.8 84.2 21.1 64.3 122.0 84.2 84.2 43.0 Valve flow coefficient, Cv or Kv Cv(Kv)=Q ere: Kv = Valve flow coefficient (flow in m 3 / at 1bar Diff. Press.) Cv = Valve flow coefficient (flow in gpm at Diff. Press. 1psi) Q = Flow rate (gpm ; m 3 /) P = Differential pressure (psi ; bar) Gf = iquid specific gravity (ater = 1.0) Cv = 1.155 Kv Gf P Equivalent Pipe engt, eq eq = k D ere: eq= Equivalent nominal pipe lengt (feet ; m) k = Equivalent lengt coefficient for turbulent flow in clean commercial steel pipe (SC 40) D = Nominal pipe diameter (feet ; m) Note: Te eq values given are for general consideration only. K = 2 g Flow resistance or ead loss coefficient, V 2 ere: K = Flow resistance or ead loss coefficient (dimensionless) = ead loss (feet ; m) V = Nominal size flow velocity (feet/sec ; m/sec.) g = Acceleration of gravity (32.18 feet/sec 2 ; 9.81 m/sec 2 )