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Pressure Reducing Control Valve - Watts Water

Watts product specifications in customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently FREE*Classic SeriesES-ACV-SB-LFF115_LFF1115 LFF115 (Globe) LFF1115 (Angle) Pressure Reducing Control Valve *The wetted surface of this product contacted by consumable Water contains less than of lead by Components(3)(3)(3)(2)(2)(1)(1)Standard 3" & SmallerStandard 4" & LargerOptional All Sizes(3)(2)(1)

4 ClassiC series ITEM DESCRIPTION MATERIAL 1 Cover ASTM A536 65-45-12 Epoxy Coated Ductile Iron 2 Cover Bearing SAE 841 Bronze 3 Shaft / Stem ASTM A276 304 Stainless Steel

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  Control, Pressure, Steel, Reducing, Valves, Stainless, Stainless steel, Stem, Pressure reducing control valve

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Transcription of Pressure Reducing Control Valve - Watts Water

1 Watts product specifications in customary units and metric are approximate and are provided for reference only. For precise measurements, please contact Watts Technical Service. Watts reserves the right to change or modify product design, construction, specifications, or materials with-out prior notice and without incurring any obligation to make such changes and modifications on Watts products previously or subsequently FREE*Classic SeriesES-ACV-SB-LFF115_LFF1115 LFF115 (Globe) LFF1115 (Angle) Pressure Reducing Control Valve *The wetted surface of this product contacted by consumable Water contains less than of lead by Components(3)(3)(3)(2)(2)(1)(1)Standard 3" & SmallerStandard 4" & LargerOptional All Sizes(3)(2)(1)

2 Schematics Throttles to reduce high upstream Pressure to constant lower downstream pressureP/L 3 2 CLOSES Valve OPENS Valve FLOW (AOS) X X X 1 Y/FC (AOS) 1 Main Valve (Single Chamber) 2 Pressure Reducing Control 3 Fixed Orifice Reducing setpoint is adjustableOperationsThe Watts ACV Pressure Reducing Control Valve is designed to automatically reduce a fl uctuating higher upstream Pressure to a constant lower downstream Pressure regardless of varying fl ow rates. It is con-trolled by a normally open, Pressure Reducing pilot designed to: 1) Open (allowing fl uid out of the main Valve cover chamber) when downstream Pressure is below the adjustable setpoint, and 2) Close (allowing fl uid to fi ll the main Valve cover chamber) when downstream Pressure is above the adjustable setpoint.

3 A decrease in downstream Pressure causes the Valve to modulate toward an open position, raising downstream pres-sure. An increase in downstream Pressure causes the Valve to modulate toward a closed position, lowering downstream Pressure . X Isolation Cocks FC Flo-Clean Strainer Y Y-Strainer (Replaces Flo-Clean) ACS Adjustable Closing Speed (Replaces Fixed Orifi ce) AOS Adjustable Opening Speed P Position Indicator L Limit SwitchOptions & Accessories2 ClassiC seriesLFF115 (Globe)LFF1115 (Angle)Body & Cover: Ductile Iron ASTM A536 Coating: NSF Listed Fusion Bonded Epoxy Lined and CoatedTrim: 316 stainless steel Elastomers: Buna-N (standard) EPDM (optional)Viton (optional) stem , Nut & stainless SteelSpring.

4 MaterialsLMDABCEFGHIJKG lobeAngleOperating PressureOperating TemperaturePilot SystemTubing & FittingsThreaded = 400 psiBuna-N: 160 F MaximumReducing ControlCopper / Brass (Standard)150 Flanged = 250 psiEPDM: 300 F Maximum20-175 psi (Standard) stainless steel (Optional)300 Flanged = 400 psiViton: 250 F Maximum0-30 psi (Optional)100-300 psi (Optional) Valve Cover Chamber CapacityValve TravelDimensionsABCDEFGHIJKLMVALVE SIZEGLOBE 150#GLOBE 300#COVER TO CENTERANGLE 150#ANGLE 300#ANGLE 150#ANGLE 300#PORT SIZEPORT SIZEPORT SIZESHIPPING WEIGHTS*1-1/47-1/43-1/23-1/41-7/81/41/21 /8151-1/27-1/48-1/293-1/23-1/441-7/841/4 1/21/81529-3/89-3/8104-15/16444-1/4444-1 /41/21/21/4352-1/2111111-5/875-1/25-1/25 -13/16444-5/161/21/23/865310-1/21213-1/4 75-1/45-3/46-1/85-1/45-3/46-1/81/21/23/8 9541515-5/88-5/86-3/47-1/86-3/47-1/81/21 /23/81906202111-3/48-1/28-7/88-1/28-7/81 /21/21/2320825-3/826-3/815-3/41111-1/211 11-1/21/211/26501029-3/431-1/818-3/414-7 /815-5/814-7/815-5/81119401234 35-1/220-5/81717-3/41717-3/411115001439 40-1/222-1/411116751641-3/843-1/226-1/41 113100*Estimated in Size (in)1-1/41-1/222-1 Gal1-1/42-1/246-1/29-1/2 Valve Size (in)

5 1-1/41-1/222-1/2346810121416 Travel (in)3/83/81/25/83/411-1/222-1/233-1/243 ClassiC seriesSizingCAVITATION ZONEINLET Pressure - PSIOUTLET Pressure - PSI3002802602402202001801601401201008060 40200 10 2040506070809013014012011010030 CAVITATION CHARTA fter selecting the Valve size, locate inlet and outlet pressures on this chart. If the intersection point falls in the shaded area, cavitation can occur. Operation of valves continually in the cavitation zone should be avoided. Consult Watts ACV for alternatives. Cavitation ChartSize (in)1-1/41-1/222-1/2346810 Maximum Continuous (GPM)95130210300485800185031005000 Maximum Intermittent (GPM)1191612653905901000230040006250 Minimum Continuous (GPM)111203050115200300 Maximum continuous fl ow based on velocity of 20 ft.

6 Per second. Maximum intermittent fl ow based on velocity of 25 ft. per second. Minimum continuous fl ow based on velocity of 1 ft. per second. NOTE: The above chart is a suggested guide. Inlet Pressure , outlet Pressure , minumum, normal and maximum fl ow rates should be considered for specifi c Valve sizing. Contact Watts ACV for details. LFF115 (Globe)LFF1115 (Angle)4 ClassiC seriesITEMDESCRIPTIONMATERIAL1 CoverASTM A536 65-45-12 Epoxy Coated Ductile Iron2 Cover BearingSAE 841 Bronze3 Shaft / StemASTM A276 304 stainless Steel4 StudASTM A570 Zinc Plated Steel5 Cover NutASTM A570 Zinc Plated Steel6 Diaphragm*Buna-N (Nitrile)7 Body ASTM A536 65-45-12 Epoxy Coated Ductile Iron8 Quad Seal*Buna-N (Nitrile)9 Seat RingASTM A743 CF8M (316)

7 stainless Steel10 SpringASTM A276 302 stainless Steel11 stem NutASTM A276 304 stainless Steel12 Diaphragm WasherASTM A536 65-45-12 Epoxy Coated Ductile Iron13 SpacerASTM A276 304 stainless Steel14 Quad Seal RetainerASTM A536 65-45-12 Epoxy Coated Ductile Iron15O-Ring*Buna-N (Nitrile)16 Quad Seal Plate ASTM A743 CF8M (316) stainless Steel17 Seat Gasket*Buna-N (Nitrile) Cross-Sectional Detail34567891112 13 14 15 16 17 1210* Contained in Main Valve Repair KitLFF115 (Globe)LFF1115 (Angle)Main Valve5 ClassiC seriesCross Sectional DetailITEM NUMBERDESCRIPTION1 Adjusting Screw2 Jam Nut3 Spring Housing4 Cap Screw5 Body 6 Spring Guide7 Spring8 Diaphragm Assembly*ITEM NUMBERDESCRIPTION9 stem Assembly*10 Spring11O-Ring*12 Bottom Cap*Included in Repair KitLFF115 (Globe)LFF1115 (Angle)Outlet InletGauge123456791011128 Pressure Reducing PilotModel LF263AP6 ClassiC seriesLFF115 (Globe)LFF1115 (Angle)InstallationsStart-UpProper Automatic Control Valve startup requires bringing the Valve into service in a controlled manner.

8 All adjustments to Control pilots and speed controls should be made slowly, allowing the Valve to respond and the system to stabilize. NOTICEC ontrol valves should be set-up in a dynamic (flowing) condition for proper start-up. Provisions for flow must be made to insure proper Close upstream and downstream valves to isolate the Valve from line Pressure . Release spring ten-sion on Pressure Reducing Control by turning adjustment screw out (counterclockwise), decreas-ing setpoint. Open all Isolation Ball valves , if so equipped. If Valve is fitted with adjustable speed controls, turn needle(s) in (clockwise) until seated, and return out (counterclockwise) 11/2 to 21/2 turns.

9 These are approximate settings, and should be fine tuned to suit system requirements after Pressure adjustments have been Slowly open upstream isolation Valve to allow controlled filling of the Valve . Vent entrapped air by carefully loosening Control tubing or pipe plug at the highest point possible. If Valve is equipped with a Position Indicator, open Air Bleed Petcock to vent air. Water will be milky in appearance and will begin to clear as air is vented. Carefully loosen enough cover screws on Control pilot(s) to vent entrapped air. Retighten when Water vents Setting Reducing Control : Slowly open downstream isolation Valve .

10 Gradually turn adjustment screw on the Pressure Reducing Control in (clockwise) to raise downstream Pressure . Allow Valve and system to stabilize. Observe inlet and outlet Pressure gauges. Continue to adjust as needed, pausing approximately every 11/2 turns, allowing Valve and system to stabilize. Turning adjustment screw clockwise raises outlet Pressure . Turning adjustment screw counterclockwise lowers outlet Pressure . When desired downstream Pressure is reached, tighten locknut on adjustment Fine tune Speed Controls to suit system requirements. Adjust Closing Speed Control (if equipped) clockwise for slower closure, and counterclockwise for faster closure.


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