Emerson Anderson Greenwood 727 Series Installation And Maintenance Instructions Manual
Pilot operated safety relief valves
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Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS
InstallatIon and MaIntenance InstructIons
Before installation these instructions must be fully read and understood
TAble oF ConTenTs
1 General valve description ................................ 2
2 Main valve maintenance ................................. 2
3 Pilot maintenance ........................................... 7
4 Pilot set pressure adjustment ..................... 15
5 leak testing assembly ................................. 17
6 field test instructions................................... 17
7 repair kits ..................................................... 18
8 repair tools ................................................... 18
Safety relief Valves (PoSrV).
sAFeTy preCAuTions
When the safety valve is under pressure never place
any part of your body near the outlet of the valve.
The valve outlet and any separate drains should
be piped or vented to a safe location.
Always wear proper safety gear to protect hands,
head, eyes, ears, etc. anytime you are near
pressurized valves.
Never attempt to remove the safety valve from a
system that is pressurized.
Never make adjustments to or perform
maintenance on the safety valve while in service
unless the valve is isolated from the system
pressure. If not properly isolated from the system
pressure, the safety valve may inadvertently open
resulting in serious injury.
Remove the safety valve prior to performing any
pressure testing of the system.
The safety of lives and property often depends on
the proper operation of the safety valve. The valve
must be maintained according to appropriate
instructions and must be periodically tested and
reconditioned to ensure correct function.
emerson.com/FinalControl
wArninG
The protection and safety of equipment, property
and personnel depends on the proper operation
of the safety valves described in this manual.
All Emerson safety valves should be kept in
proper working condition in accordance with the
manufacturer's written instructions. Periodic
testing and maintenance by the user of this
equipment is essential for reliable and safe valve
operation.
All installation, maintenance, adjustment, repair
and testing performed on safety valves should be
done by qualified technicians having the necessary
skills and training adequate to perform such work.
All applicable Codes and Standards, governing
regulations and authorities should be adhered to
when performing safety valve repair. No repair,
assembly, adjustment or testing performed by
other than Emerson or its authorized assemblers
and representatives shall be covered by the
warranty extended by Emerson to its customers.
The user should use only original, factory supplied
OEM parts in any maintenance or repair activity
involving this product.
This Maintenance Manual is provided as a general
guide for the repair and maintenance of the
safety valves described herein. It is not possible
to describe all configurations or variations with
such equipment. The user is advised to contact
Emerson Valves and Controls or its authorized
assemblers and representatives for assistance
in situations that are not adequately covered or
described in this manual.
Before removing a safety valve for maintenance,
ensure that the system pressure has been fully
depressurized. If an isolation block valve is used
ensure that any trapped fluid between the block
valve and the safety valve is safely vented.
Before disassembling the safety valve ensure that
the valve has been decontaminated from any harmful
gasses or fluids and that it is at a safe temperature
range for handling. Fluids can be trapped in the
dome space of pilot operated safety valves.
Before installation, the Installation and
Operational Safety Instructions should be fully
read and understood. These Instructions may
be requested from the factory or are available at
Emerson.com/FinalControl
© 2017 emerson. all rights reserved.
engineering doc. #05.9040.192 rev. K
VCioM-06013-en 17/11
Table of Contents
Related Manuals for Emerson Anderson Greenwood 727 Series
Summary of Contents for Emerson Anderson Greenwood 727 Series
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Page 1: Table Of Contents
The protection and safety of equipment, property and personnel depends on the proper operation of the safety valves described in this manual. All Emerson safety valves should be kept in proper working condition in accordance with the manufacturer’s written instructions. Periodic... -
Page 2: General Valve Description
Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 1 GenerAl VAlVe desCripTion damper may be stuck in the piston and described in Section 8 are not available, could suddenly release after the cap is both rings can be hand installed on the 1.1 operation removed. - Page 3 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 2.2.4 if the unloader assembly requires service, fiGUre 1 disassemble by clamping the unloader body in a steel jawed vise and unscrew the hex head bushing with a 12” crescent wrench. Unloader remove and discard the seal.
- Page 4 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons pArTs fiGUre 2 item description see detail d Body Nozzle Piston liner Stud Piston damper retainer screw dome spring damper ring see detail e Piston seal ring for 6” and 8”...
- Page 5 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons fiGUre 3 Pilot valve lifting lug Unloader valve Main valve outlet dome shuttle dome tube (self draining) inlet shuttle Supply tube (self draining) inlet 2” and 3” valve with field test accessory Pilot valve lifting lug Unloader valve...
- Page 6 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons outlet fiGUre 3a lifting lug 6” and 8” valve Unloader valve Pilot valve dome tube (self draining) Supply tube (self draining) Vent stack drain port Main valve Valve sizes 6 x 8, 8 x 10 without field test option inlet outlet lifting lug...
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Page 7: Pilot Maintenance
Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 3 piloT MAinTenAnCe B. lubricate reseat seat threads lightly with fluorolube to prevent galling. 3.1 pilot disassembly C. install reseat seat (12) into the blowdown (Refer to Figure 4A style pilot) adjustment (21) screw. - Page 8 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons N. after setting minimum pilot lift to the adjustment screw (21) with an ” specified range (.010”-.025”), and before wrench and remove tube fitting from removing the dial indicator, adjust the blowdown adjustment screw (21).
- Page 9 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 4. install pin (43) into seal retainer (41). G. install ¼ NPt pipe plugs in the upper two Pin must protrude .062” to .067” into ports shown at (22) coated with Jet-lube adjustment sleeve (42) pocket.
- Page 10 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons fiGUre 4a original design pilot assembly Sealing wire see detail A Vent dome Note washer orientation detail A Supply pArTs item description item description item description Body reseat piston Washer, bonnet Bonnet...
- Page 11 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons Sealing wire fiGUre 4B second generation design pilot assembly beginning with serial no: 92-10501 see detail A Vent dome port install in hole nearest this view Note washer orientation detail A Supply port pArTs...
- Page 12 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons fiGUre 4C blowdown adjustment pre-assembly Shim placement...
- Page 13 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons shim Thickness fiGUre 5a 06.0925.003 .063 Movable stem 06.0925.002 .025 06.0925.001 .012 2” dial indicator 0.100 Stem travel 1.00 Stem extension 1. install pilot on test stand. 2.
- Page 14 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons fiGUre 5B shim Thickness Movable stem 06.0925.003 .063 06.0925.002 .025 06.0925.001 .012 2” dial indicator 0.100 Stem travel 1.00 Stem extension 1. install pilot on test stand. 2. With pilot assembled as shown, without spring, spring washer and adjusting screw, rotate blowdown adjustment sleeve counterclockwise to place the adjustment...
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Page 15: Pilot Set Pressure Adjustment
Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 4 piloT seT pressure AdjusTMenT 4.3.1.2 Set pressure adjustment (Refer to Figure 4A and 4B) 4.1 General remove cap (3) and loosen locknut (6). two adjustments are provided; one for adjust the spring adjusting screw (5) to adjusting the set pressure and one for adjusting obtain the correct set pressure. - Page 16 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 4.5 performance requirements 4.4.4 repeat paragraphs 4.4.1 through 4.4.3 a minimum of three times. the cracking Cold differential set is the increase in specified set to compensate for the change in spring force pressure, set pressure and reseat pressure with increased temperature.
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Page 17: Leak Testing Assembly
Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 5 leAk TesTinG AsseMbly fiGUre 7 Manual blowdown valve (option) field test injection port (¼-NPt male elbow 5.1 Air not supplied) lift lever (option) the main valve with pilot assembled to it and all tubing connections should be leak tested for external leaks using a pressure equal to 90% of set. -
Page 18: Repair Kits
Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 7 repAir kiTs the kits listed below are available from stock. to order kits specify the base number and select the last three digits from the following tables. to make sure correct kits are purchased the order should specify the valve model and serial number. - Page 19 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 8.2 piston installation sleeve 8.3 special 1. 12 point sockets, nozzle retaining screw removal/installation ¼” for 2 x 3, 3 x 4 10° ” for 4 x 6 .03 r optional a Ø...
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Page 20: Piston Disk And Nozzle Sealing Face Repair
Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 9 pisTon disk And nozzle seAlinG FACe 9.2 remachining disk and nozzle repAir Machining of the piston chamfer to maintain the minimum “B” dimension is permissible the piston disk and nozzle seat faces are until the minimum “a”... - Page 21 Anderson Greenwood SerieS 727 Pilot oPerated Safety relief ValVeS InstallatIon and MaIntenance InstructIons 9.2.1 Lathe set-up for nozzle machining Grip nozzles with a four jaw independent chuck as shown being careful not to damage clamped sealing surface. true up Chuck jaw the work so that surface runs flat ± 001 on indicator.
- Page 22 Greenwood is a mark owned by one of the companies in the emerson automation Solutions business unit of emerson electric Co. emerson automation Solutions, emerson and the emerson logo are trademarks and service marks of emerson electric Co.