High Performance Safety Relief Valves
INSTALLATION,
OPERATION, & MAINTENANCE MANUAL
Revision:
B
Date of Issue:
Oct. 2, 2015
Approved by:
GG
jwo
Project Engineer
Engineering Projects Director
F70VP SERIES
VACUUM
RELIEF VALVE
Страница 1: ...rformance Safety Relief Valves INSTALLATION OPERATION MAINTENANCE MANUAL Revision B Date of Issue Oct 2 2015 Approved by GG jwo Project Engineer Engineering Projects Director F70VP SERIES VACUUM RELIE...
Страница 2: ...2 Service Envelope 5 2 3 Installation 6 2 4 Startup 6 3 0 Main Valve Maintenance 3 1 Disassembly of the F70VP Series Main Valve 7 3 2 Reassembly of the F70VP Series Main Valve 10 4 0 Pilot Valve Main...
Страница 3: ...sembly is performed as outlined in this manual there is no safety hazard Cycling the valve at least once a year is considered to be good practice to verify operation 3 When a new valve leaves FLOW SAF...
Страница 4: ...rough the pilot valve and to the dome cavity of the main valve At the designated vacuum set pressure the pilot allows dome pressure to be drawn down to a vacuum state proportionally to demand at set p...
Страница 5: ...E ENVELOPE 1 Confirm low temperature environmental applications with factory 2 Ratings based on use as low pressure seat in 1 1 2 x 2 2 x 3 and 3 x 4 only 3 PSI VAC as used in this document is equival...
Страница 6: ...cked open during normal system operation 2 4 STARTUP Foreign particles or dirt can damage the valve and make it inoperative Prior to installation clean out the piping thoroughly A screen may be fasten...
Страница 7: ...Item 5 Pg 8 comes out with the piston assembly Care must be taken during this removal because any damage might result in an eventual sealing problem when the valve is reassembled 6 The liner may then...
Страница 8: ...s 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 5 ps...
Страница 9: ...and up Qty of 2 Item 5 no Item 5a 4 x 6 6 x 8 Item 5a optional on smaller sizes F70VP LOW PRESSURE PISTON ASSEMBLY 1 1 2 x 2 2 x 3 3 x 4 PISTON ASSEMBLY PARTS LIST Item No Description 1 Retainer scre...
Страница 10: ...NOTE Female thread in piston must have locking thread insert Item 7 Pg 9 For low pressure pistons the retainer is threaded and needs to be tightened 4 Install the piston seal and backup ring if provi...
Страница 11: ...vise 3 Apply Loctite to retainer screw and use it to attach seat and retainer to spindle Insert spindle into the body Lightly lubricate nozzle O ring with Dow Corning 33 or equal fit over nozzle and...
Страница 12: ...INSTALLATION OPERATION MAINTENANCE MANUAL TITLE F70VP Series Rev B Vacuum Relief Valve Page 12 of 20 Assembly Illustration F100 Pilot Valve High Pressure...
Страница 13: ...to retainer screw and use it to attach seat and retainer to spindle Insert spindle into the body Lightly lubricate nozzle O ring with Dow Corning 33 or equal fit over nozzle and then tighten nozzle in...
Страница 14: ...INSTALLATION OPERATION MAINTENANCE MANUAL TITLE F70VP Series Rev B Vacuum Relief Valve Page 14 of 20 Assembly Illustration F100 Pilot Valve Low Pressure...
Страница 15: ...isted in the table below These values indicate the point at which the main valve piston is able to open based on the area differential between the piston top and main seat F70VP Dome Pressure F70VP Do...
Страница 16: ...about 90 of the designated PSI VAC set pressure b If using a positive pressure test stand connect the main valve side connection to the stand leaving the bottom process connection open to atmosphere P...
Страница 17: ...ilot inlet simultaneously keeping the pilot closed and routing air into the main valve dome to seat the piston Check outlet for indications of leakage c Slowly vent off pressure from test source Disas...
Страница 18: ...g for obstructions clean unplug The main valve does not open Pilot valve not set correctly Check set point on pilot Ensure correct pressure units are being used psi vac vs psia Vacuum not maintained i...
Страница 19: ...DXY VPHP 10X12 DXY VPHP 12X16 DXY VPLP 15X02 DXY VPLP 02X03 DXY VPLP 03X04 DXY VPLP 04X06 DXY VPLP 06X08 DXY VPLP 08X10 DXY Contents See drawings parts lists on Pages 5 7 8 9 Qty Qty Wear ring HP belo...
Страница 20: ...00V BHP DXYZ High pressure bracket mount F100V DHP DXYZ High pressure direct mount Contents See drawings on Pages 12 14 Qty Qty Seat 1 Diaphragm gasket for Teflon diaphragm only 1 Diaphragm 1 Upper ho...
