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Victaulic FireLock 758-LPA Series Installation, Maintenance, & Testing Manual

Preaction valve
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Installation, Maintenance, & Testing Manual
Series 758-LPA
™
FireLock
Preaction Valve
with Series 776
Low-Pressure Actuator
Double-Interlock, Pneumatic/Electric
Release Trim
Hang these instructions on the
installed valve for easy future reference.
Failure to follow instructions and warnings can result in serious personal injury, property damage, and/or product failure.
• Read and understand all installation instructions before attempting to install any Victaulic piping products.
• Wear safety glasses, hardhat, and foot protection.
If you need additional copies of any literature, or if you have any questions about the safe installation and operation of this product,
contact Victaulic Company, P.O. Box 31, Easton, PA 18044-0031, USA, Telephone: 1-800-PICK VIC, e-mail: pickvic@victaulic.com.
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Summary of Contents for Victaulic FireLock 758-LPA Series

  • Page 1 Failure to follow instructions and warnings can result in serious personal injury, property damage, and/or product failure. • Read and understand all installation instructions before attempting to install any Victaulic piping products. • Wear safety glasses, hardhat, and foot protection.

  • Page 2: Table Of Contents

    NOTICE The use of the word “NOTICE” identifies special instructions that are important but not related to hazards. ® Registered Trademark of Victaulic © Copyright 2002 Victaulic Printed in U.S.A...

  • Page 3: Installer Safety Instructions

    If you need additional copies of any literature, or if you have any questions about the safe installation and operation of this valve, contact Victaulic Company, P.O. Box 31, Easton, PA 18044-0031 USA, Telephone: 1-800-PICK Vic, e-mail: pickvic@victaulic.com. • Depressurize and drain piping systems before attempting to install or remove any Victaulic piping products.

  • Page 4: Introduction

    INTRODUCTION The following instructions are a guide for proper installation of Victaulic Series 758 Preaction Valves. These instructions involve pipe that is properly prepared and grooved in accordance with current Victaulic specifications. TRIM DIMENSIONS NOTE: The drawings below show a 4-inch (100-mm) configuration.

  • Page 5: Exploded View Drawing - Trim Components

    EXPLODED VIEW DRAWING – TRIM COMPONENTS Series 758 Actuated Valve With Double-Interlock, Pneumatic/Electric Release - Preaction Trim (Optional Accessories Also Shown) Drain WATER MOTOR ALARM SERIES 760 LISTED U L C Drain To Drain Drain Optional Air Maintenance Device Drain Drain Flanged Grooved...

  • Page 6: Exploded View Drawing - Internal Valve Components

    EXPLODED VIEW DRAWING – INTERNAL VALVE COMPONENTS Piston Clapper Assembly Latch Alarm Seal Outlet "WEEP" Hole Alarm (Deluge and Preaction Valves) Test Seat Exaggerated for Clarity BILL OF MATERIALS 1 Valve Body 8 Bolt Seal 15 Cover Plate Bolts (Qty. 7) 2 Clapper 9 Clapper Spring 16 Piston...

  • Page 7: Section View Drawing And Description - Series 776 Low-Pressure Actuator Operation

    SECTION VIEW DRAWING AND DESCRIPTION – SERIES 776 LOW-PRESSURE ACTUATOR OPERATION The Series 776 Low-Pressure Actuator is located in the Since the area of the lower diaphragm (exposed to water trim of pneumatically released Series 758 Preaction Valves pressure in the middle chamber) is greater than the area and acts as the trigger for these systems.

  • Page 8: Section View Drawing And Description - Series 746 Dry Accelerator

    SECTION VIEW DRAWING AND DESCRIPTION – SERIES 746 DRY ACCELERATOR The Series 746 Dry Accelerator exhausts air from the actuator to speed the operation of the valve. A diaphragm separates the Series 746 Dry Accelerator into two chambers. The closing chamber contains a compression spring, which maintains this chamber in the closed position.

  • Page 9: Compressor And Air Maintenance Trim Requirements

    5 psi (34 kPa) above the set point of the regulator. 4) The Victaulic air regulator is a relief-type design. Any pressure in the system that is above the set point of the regulator will be released.

  • Page 10: Proper Air Supplies For Series 758 Preaction Valves Used With Series 776 Low-Pressure Actuators

    7. Air supplies must be regulated, restricted, and continu- air to a system using a Series 776 Low-Pressure Actuator, ous. NOTE: Victaulic recommends the use of an air main- it is not necessary to use the air maintenance trim assem- tenance device on any system with an automatic air bly with the air regulator.

  • Page 11: Valve/Trim Installation

    5. Install valve, trim, and accessories per applicable trim drawings. The Victaulic Series 758 Preaction Valve is manufactured and listed for a maximum working pressure of 300 psi (2065 kPa) and is factory tested to 600 psi (4135 kPa). The...

  • Page 12: Placing The System In Service

    PLACING THE SYSTEM IN SERVICE Accelerator Isolation • Make sure the Series 758 Preaction Valve is properly heated and protected from Ball Valve freezing temperatures and physical damage. Failure to follow this instruction could cause improper valve operation, resulting in serious personal injury and/or property damage.
  • Page 13 Auto Drain Piston Protective Charge Line Ball Valve 7. Remove the protective cap from the Series 749 Auto 8. Close the piston charge line ball valve. Drain. Fast-Fill Ball Valve Auto Drain Knob 9. Charge the system with air by turning on the compres- 7a.
  • Page 14 Fast-Fill Ball Valve Protective 9c. While the system is charging, remove the protective 9f. When the system reaches a minimum of 13 psi cap from the auto vent of the Series 776 Low-Pressure (90 kPa), close the fast-fill ball valve on the air mainte- Actuator.
  • Page 15 ¹⁄₄-inch Ball Valve Auto Drain Knob 12. Open the ¹⁄₄-inch ball valve located between the 14. Pull up on the auto drain knob until it is set in the “UP” Series 776 and the solenoid so that a stream of water position.
  • Page 16 ¹⁄₄-inch Accelerator ¹⁄₄-turn Ball Valve Vent Ball Valve 18b. Close the ¹⁄₄-turn vent ball valve on the Series 746 17. For water pressures greater than 30 psi (207 kPa): Open and then immediately close the ¹⁄₄-inch ball Dry Accelerator. This will set the accelerator. valve located between the Series 776 and the solenoid.
  • Page 17 Water Supply's Water Supply's Main Control Main Control Valve Valve 22. Open the water supply’s main control valve slowly 24a. If water is flowing from the drip check, close the until a steady flow of water flows from the open water water supply’s main control valve, and start over at step 1.

  • Page 18: External Inspection

    • It is important that the system is inspected regularly, according to proper procedures. • The Victaulic Series 758 Preaction Valve and trim must not be exposed to foreign material, corrosive environments, freezing conditions, contaminated water supplies, or any other condition that could impair proper system operation.

  • Page 19: Required Tests

    Water Supply REQUIRED TESTS Main Drain Valve • Any activities that require taking the valve out of service may eliminate the fire protection provided. • Before servicing or testing the system, notify the authority having jurisdiction. • Consideration of a fire patrol should be given in the affected areas. Failure to follow these instructions could result in serious personal injury and/or property damage.
  • Page 20 Alarm Test Water Supply Ball Valve Main Drain Valve 2. Open the water supply main drain valve fully to flush 5. Open the alarm test ball valve. Confirm that mechanical the water supply of any contaminants. and electrical alarms provided are activated and that remote monitoring stations, if provided, receive an alarm signal.

  • Page 21: Water Level And Low-Air Alarm Tests

    Alarm Test Ball Valve Drip Check 9. Confirm that the alarm test ball valve is closed. 12. Verify that the valve’s intermediate chamber is dry. No water should flow from the drip check. Alarm Drain 13. Notify the authority having jurisdiction, remote sta- Ball Valve tion alarm monitors, and those in the affected area that the valve is back in service.
  • Page 22 Water Supply Main Drain Valve System Main Drain Valve 3. Open the water supply main drain valve fully to flush 6. Partially open the system main drain valve slowly. Con- the water supply of any contaminants. firm that no water is flowing from the drain. NOTE: If water is flowing, the system may not have drained prop- erly.
  • Page 23 Accelerator Isolation Fast-Fill Ball Valve Ball Valve 10a. Open the isolation ball valve on the Series 746 Dry 9a. When the system reachs a minimum of 13 psi Accelerator. (90 kPa), close the fast-fill ball valve on the air mainte- nance device.

  • Page 24: Trip Tests

    Main Control Valve ation; however, this test does not confirm full system operation. Victaulic recommends that the partial trip test 12. Open the water supply’s main control valve slowly be performed annually. NOTE: The authority having juris- until a steady flow of water flows from the open water diction in your area may require that you perform this supply main drain valve.

  • Page 25: Full Trip Test

    9. Confirm that the piston charge line pressure drops to zero and that water is flowing through the auto drain to Victaulic recommends full trip testing every three years. the drip cup. This test allows a full flow of water into the sprinkler sys- tem;...
  • Page 26 Water Supply Main Drain Valve Water Supply's Main Control Valve 3. Open the water supply main drain valve fully to flush 10. Close the water supply’s main control valve. the water supply of any contaminants. Water Supply Piston Main Drain Charge Line Valve Ball Valve...

  • Page 27: Required Internal Inspection

    • Depressurize and drain piping systems before attempting to disassemble any Victaulic piping products. 3. Close the water supply main drain valve. Failure to follow this instruction could result in serious personal injury, property damage, and/or product damage.
  • Page 28 Piston Charge Line • Make sure valve is depressurized and drained Ball Valve before removing cover plate bolts. The cover plate will blow off if these bolts are removed while the valve is pressurized, resulting in serious personal injury and/or property damage. 7.

  • Page 29: Maintenance

    It is important that care be taken to avoid damage to parts. • Depressurize and drain piping systems before attempting to disassemble any Victaulic piping products. Failure to follow this instruction could result in se- rious personal injury, property damage, and/or product damage.
  • Page 30 Smaller diameters of seal ring and clapper seal Larger diameter • DO NOT pry the seal washer out of the clapper seal from the inner hole. of clapper seal Failure to follow this instruction could damage the seal washer, resulting in improper is installed in clapper sealing and property damage.

  • Page 31: Removing And Replacing Clapper Assembly

    10. Place seal retaining ring onto seal washer of clapper seal. 2. Remove clapper shaft-retaining plugs from valve body. • Use only Victaulic-supplied replacement seal assembly bolt/bolt seal when reassembling clapper. Failure to follow this instruction could result in property damage and/or valve leak- age.

  • Page 32: Installing Cover Plate Gasket And Cover Plate

    Installing Cover Plate Gasket and Cover Plate 1. Verify cover plate gasket is in good condition. If gasket is torn or worn, replace with a new, Victaulic-supplied gasket. 8. Place other spacer between clapper and valve body, and finish inserting clapper shaft through clapper arm and valve body, as shown above.

  • Page 33: Removing And Replacing Piston Assembly

    DO NOT over- hole to make sure any debris is removed. tighten these cover bolts. 5. Replace piston with a new, Victaulic-supplied assem- bly. Make sure o-ring is installed flush to piston body.

  • Page 34: Replacing The Strainer Screen For Series 776 Low-Pressure Actuators

    Victaulic-supplied screen. Failure to follow this instruction could cause improper system operation, resulting in property damage. 4. Use a new, Victaulic-supplied strainer screen. Insert the strainer screen into the strainer assembly. 5. Install the strainer assembly into the Series 776 care- fully.

  • Page 35: Troubleshooting Series 776 Low-Pressure Actuator

    Make sure there are no restrictions in the inspector’s test connection. Air decay rate of system is too slow. If the above procedures do not work, contact Victaulic. Dry accelerator does not set up Dry accelerator is installed upside...

  • Page 36: Warranty

    DAMAGES FOR LOST PROFITS, LOST SALES, INJURY TO PERSON OR PROPERTY OR ANY OTHER INCIDENTAL OR CON- SEQUENTIAL LOSS) SHALL BE AVAILABLE TO HIM. Victaulic neither assumes nor authorizes any person to assume for it any other liability in connection with the sale of such products.

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