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Hydro PRV-71H Series Operation And Maintenance Manual

Pressure reducing valve
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Series PRV-71H Pressure Reducing Valve
Operation and Maintenance Manual
All Hydro Instruments Chemical Feed systems are carefully
designed and tested for years of safe, accurate fi eld service.
All Hydro Instruments systems are tested prior to shipment.
All Hydro Instruments products are made of the fi nest
materials.
To ensure best operation, read these
instructions carefully and completely and store them where
all maintenance personnel will have access to them.
Series PRV Rev. 9/6/2024
1

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Summary of Contents for Hydro PRV-71H Series

  • Page 1 All Hydro Instruments Chemical Feed systems are carefully designed and tested for years of safe, accurate fi eld service. All Hydro Instruments systems are tested prior to shipment. All Hydro Instruments products are made of the fi nest materials. To ensure best operation, read these instructions carefully and completely and store them where all maintenance personnel will have access to them.

  • Page 2: Table Of Contents

    Pressure Reducing Valve Operation and Maintenance Manual Table of Contents I. Manually Set Pressure Reducing Valve 1. Introduction ................... 3 2. Installation ..................3 3. Operation ..................3 4. Maintenance.................. 4 II. Electronically Actuated Pressure Reducing Valve 1. Introduction ................... 4 2.

  • Page 3: Manually Set Pressure Reducing Valve

    All pipe and fi ttings must be carefully cleaned and checked for leaks before system startup. For details on piping guidelines, see the Chlorine Institute Inc. Pamphlet 6 or Hydro Instruments own Ton Container Manifolds for Gas Withdrawal Systems - Design Considerations (Doc. TCMGWS-DC).

  • Page 4: Maintenance

    increasing the outlet pressure and turning it counterclockwise will decrease the outlet pressure. Adjustments should be made slowly and carefully, while monitoring the pressure with a pressure gauge installed on the downstream side of the pressure reducing valve. 4. MAINTENANCE The frequency of required cleaning or maintenance will depend on the quality of the gas supply and the gas fl...

  • Page 5: Operation

    The electronic actuator does not require any routine maintenance and should not be tampered with unless by factory trained personnel. If you are experiencing problems with the actuator contact Hydro Instruments or your local Hydro Instruments sales representative. If the actuator no longer is able to open the valve, then it may require replacement.

  • Page 6: Parts Drawings

    Date: 2024-09-06-v1 EXPLODED VIEW PRESSURE REDUCING Dwg. No. PRV-71H, EXP AND SHUTOFF VALVE...
  • Page 7 Item Part Description Quantity Upper End Cap PRH-378U-8000 Adjustment Screw PRH-396G-8000 Mounting Bracket PRH-353A-8000 Lead Gasket (Upper End Cap) GAH-LED-333 Hex Head Screw, -16 x 1 " BTH-STA-040F Upper Valve Body PRH-23076-8000 Seat Cap and Seat Cap Bushing Assembly Seat Cap (pre-assembled with bushing) PRH-640A-8000 Seat Cap Bushing (pre-assembled with cap) PRH-640B-8000...
  • Page 8 Date: 2024-09-04-v1 EXPLODED VIEW ELECTRONIC PRESSURE REDUCING Dwg. No. PRV-71H-ELE, EXP AND SHUTOFF VALVE...
  • Page 9 Item Part Description Quantity Actuator (120 V) PRHA-766-120 Actuator (240 V) PRHA-1025-240 Stem Nut PRH-142E-000 Hex Nut, Actuator BTH-STA-AN Set Screw, 5-40 x ", SS BTH-STA-54018 Locking Nuts, HCX, BTH-STA-5818 Valve Ram Stem PRH-433E-000 Valve Gland PRH-433G-000 O-Ring OH-VIT-212 O-Ring OH-VIT-114 Mounting Bracket PRH-353A-8000...
  • Page 10 Date: 2024-09-06-v1 EXPLODED VIEW PRESSURE REDUCING Dwg. No. PRV-71H-NH3, EXP AND SHUTOFF VALVE (AMMONIA)
  • Page 11 Item Part Description Quantity Upper End Cap PRH-378U-8000 Adjustment Screw PRH-396G-8000 Mounting Bracket PRH-353A-8000 Upper End Cap Lead Gasket GAH-LED-333 Hex Head Screw, -16 x 1 " (Stainless) BTH-STA-040F-SS Upper Valve Body PRH-23076-8000 Seat Cap and Seat Cap Bushing Assembly Seat Cap (pre-assembled with bushing) PRH-640A-8000 Seat Cap Bushing (pre-assembled with cap)
  • Page 12 Date: 2024-09-04-v1 EXPLODED VIEW ELECTRONIC PRESSURE REDUCING Dwg. No. PRV-71H-ELE-NH3, EXP AND SHUTOFF VALVE (AMMONIA)
  • Page 13 Item Part Description Quantity Actuator (120 V) PRHA-766-120 Actuator (240 V) PRHA-1025-240 Stem Nut PRH-142E-000 Hex Nut, Actuator BTH-STA-AN Set Screw, 5-40 x ", SS BTH-STA-54018 Locking Nuts, HCX, BTH-STA-5818 Valve Ram Stem PRH-433E-000 Valve Gland PRH-433G-000 O-Ring OH-BUN-212 O-Ring OH-BUN-114 Mounting Bracket PRH-353A-8000...

  • Page 16: Circuit Board Drawing

    GROUND NEUTRAL LINE GROUND GROUND COM. NEUTRAL Common Normally NEUTRAL N.O. LINE Open Normally Closed LINE N.C. Date: 2019-09-16-v1 PRV-71H-ELE Dwg. No. PRV-PCB-1 CIRCUIT BOARD...

  • Page 17: Heater Drawing

    PRV-71H GREEN LED WITH HEATER INDICATOR THERMOSTAT PRV-71H-ELE WITH HEATER HEATER POWER CORD THERMOSTAT HEATER POWER CORD HOOK AND LOOP FASTENERS FRONT FLAT PATTERN VIEW BACK FLAT PATTERN VIEW THERMOSTAT HEATER POWER CORD Date: 2019-09-16-v1 HEATER for PRV-71H and PRV-71H-ELE...

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