Related Manuals for Flow Safe F70VP Series
Summary of Contents for Flow Safe F70VP Series
- Page 1 High Performance Safety Relief Valves F70VP SERIES VACUUM RELIEF VALVE INSTALLATION, OPERATION, & MAINTENANCE MANUAL Revision: Date of Issue: Oct. 2, 2015 Approved by: Project Engineer Engineering Projects Director...
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Page 2: Table Of Contents
Installation .................... 6 Startup ....................6 Main Valve Maintenance Disassembly of the F70VP Series Main Valve ........7 Reassembly of the F70VP Series Main Valve........10 Pilot Valve Maintenance F100 Pilot Valve (High pressure: 2 – 14.6 psi vac) ......11 F100 Pilot Valve (Low pressure: 0.36 –... -
Page 3: General
Cycling the valve at least once a year is considered to be good practice to verify operation. When a new valve leaves FLOW SAFE, it has been manufactured and tested by trained and experienced personnel. When you remove a valve from your system and perform the maintenance tasks that are outlined herein you will need proper training. -
Page 4: Description, Operation, Service Envelope, Installation, & Startup
DESCRIPTION, OPERATION, SERVICE ENVELOPE, INSTALLATION, and STARTUP DESCRIPTION / OPERATION The FLOW SAFE F70VP Series vacuum relief valve provides vacuum protection with the ability to handle large volumes and provide consistent, leak-tight seating. This valve is a variation of the F70PR Series or F7000 pilot-operated relief valve, and is also intended for installations where ASME Code construction is not required. -
Page 5: Service Envelope
INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 5 of 20 For systems that normally operate on positive gage pressure, the F70VP pilot tubing must be fitted with backflow preventer check valves to keep the main valve closed when not under vacuum. A typical... -
Page 6: Installation
Prior to installation, check that the vacuum set pressure on the nameplate is as specified, and meets system requirements. The F70VP Series vacuum relief valve should be installed in the upright position as shown below, in accordance with accepted piping practices. -
Page 7: Main Valve Maintenance
Vacuum Relief Valve Page 7 of 20 MAIN VALVE MAINTENANCE DISASSEMBLY OF THE F70VP SERIES MAIN VALVE (See parts lists and illustrations on Pages 7 - 9) CAUTION: It is extremely dangerous to attempt to disassemble any valve while it remains in service connected to a pressure or vacuum source. - Page 8 INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 8 of 20 Assembly Illustration: 1-1/2” x 2” through 3” x 4” HIGH PRESSURE LOW PRESSURE MAIN VALVE SUBASSEMBLY MAIN VALVE SUBASSEMBLY ( 5 psi vac. – 14.6 psi vac.) ( 0.36 psi vac.
- Page 9 INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 9 of 20 Piston Assembly Illustrations F70VP HIGH PRESSURE F70VP LOW PRESSURE PISTON ASSEMBLY, 1x2 – 3x4 PISTON ASSEMBLY 4 x 6 & 6 x 8 (On 4x6 and up: Qty.
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Page 10: Reassembly Of The F70Vp Series Main Valve
Vacuum Relief Valve Page 10 of 20 REASSEMBLY OF THE F70VP SERIES MAIN VALVE Reassembly of these valves is basically the reverse of disassembly. Care must be taken in the handling of all items, particularly sealing surfaces and softgoods. All parts should be clean and free of any debris or contaminants. -
Page 11: Pilot Valve Maintenance
INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 11 of 20 PILOT VALVE MAINTENANCE F100 PILOT VALVE (HIGH PRESSURE: 2 – 14.6 psi vac) (See Illustration on Page 12) Disassembly CAUTION: It is extremely dangerous to attempt to disassemble any valve while it remains in service connected to a pressure or vacuum source. - Page 12 INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 12 of 20 Assembly Illustration: F100 Pilot Valve (High Pressure)
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Page 13: F100 Pilot Valve (Low Pressure: 0.36 - 5 Psi Vac)
INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 13 of 20 F100 PILOT VALVE (LOW PRESSURE: 0.36 to 5 psi vac) (See Illustration on Page 14) Disassembly CAUTION: It is extremely dangerous to attempt to disassemble any valve while it remains in service connected to a pressure or vacuum source. - Page 14 INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 14 of 20 Assembly Illustration: F100 Pilot Valve (Low Pressure)
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Page 15: Pilot Valve Set Pressure Adjustment
(out) to decrease the set pressure. Depending on test equipment available, the valve may be set as described in (4) or (5) below. Test procedure with pilot tested separately using a test plate assembly (available from Flow Safe) as shown in the figure on Page 16: a) Slowly increase inlet pressure to set point, which occurs when pilot exhaust is first detected at the exhaust port shown in the figure. -
Page 16: Final Assembly Testing
INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 16 of 20 FINAL ASSEMBLY TESTING Assemble the pilot valve, if included, to the main valve or its mounting bracket with four 5/16”- 24UNF mounting bolts and nuts. Tighten the bolts securely. For assemblies without pilot, install the tubing between the pickup tube connection and cap. - Page 17 INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 17 of 20 To check backflow preventer operation: a) Connect the main valve process connection to test air source. Pilot inlet should be open to atmosphere.
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Page 18: Troubleshooting Guide
INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 18 of 20 TROUBLESHOOTING GUIDE Symptom Possible Cause Remedy Cap bolt(s) loose, or insufficient / Retighten the cap bolts per Section 3.2. The main valve leaks uneven bolt torque. -
Page 19: Softgoods Kits
EPR / EPDM Kalrez Chemraz Lo-temp nitrile Teflon – FEP film (diaphragms only) Most common materials listed; contact Flow Safe for availability of other materials. MAIN VALVE SOFTGOODS Softgoods Kit Part Number Valve Size High Pressure Piston Low Pressure Piston... - Page 20 INSTALLATION, OPERATION, & MAINTENANCE MANUAL TITLE: F70VP Series Rev. B Vacuum Relief Valve Page 20 of 20 PILOT VALVE SOFTGOODS F100 Pilot Softgoods Kit: Low pressure, bracket-mount F100V-BLP-DXYZ High pressure, bracket-mount F100V-BHP-DXYZ High pressure, direct-mount F100V-DHP-DXYZ Contents (See drawings on Pages 12 & 14): Qty.