Pentair ANDERSON GREENWOOD 95 POSRV Technical specifications

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
VALVES & CONTROLS
ANGMC-6026-US-1312 Copyright © 2013 Pentair
The intent of these instructions is to acquaint the user with the maintenance of this product.
Please read these instructions carefully.
Engineering Doc. #05.9040.083 Rev. E
SAFETY PRECAUTIONS
When the pressure relief valve is under
pressure never place any part of your
body near the pilot exhaust nor the outlet
of the main valve.
The main valve outlet should be piped or
vented to a safe location.
Always wear proper safety gear to protect
head, eyes, ears, etc. anytime you are
near pressurized valves.
Never attempt to remove the pressure
relief valve from a system that is
pressurized.
Never make adjustments to or perform
maintenance on the pressure relief valve
while in service unless the valve is isolated
from the system pressure. f not properly
isolated from the system pressure, the
pressure relief valve may inadvertently
open resulting in serious injury.
Remove the pressure relief valve prior to performing any pressure testing of the
system.
The safety of lives and property often depends on the proper operation of the pressure
relief valve. The valve must be maintained according to appropriate instructions and
must be periodically tested and reconditioned to ensure correct function.
WARNING
Removal of the seal wires in an attempt to adjust and/or repair this product by
unauthorized or unqualified persons voids the product warranty and may cause
damage to equipment and serious injury or death to persons.
The product is a safety related component intended for use in critical applications.
The improper application, installation or maintenance of the product or the use of
parts or components not manufactured by Anderson Greenwood may result in a
failure of the product.
Any installation, maintenance, adjustment, test, etc. performed on the Product must
be done in accordance with the requirements of all applicable Anderson Greenwood
Procedures and nstructions as well as applicable National and nternational Codes
and Standards.
STORAGE A D HA DLI G
Pressure relief valve performance may be adversely affected if the valve is stored for
an extended period without proper protection. Rough handling and dirt may damage,
deform, or cause misalignment of valve parts and may alter the pressure setting and
adversely affect valve performance and seat tightness. t is recommended that the
valve be stored in the original shipping container in a warehouse or as a minimum on a
dry surface with a protective covering until installation. nlet and outlet protectors
should remain in place until the valve is ready to be installed in the system.
1.0 GE ERAL VALVE DESCRIPTIO (REFER TO FIGURE 1)
The Anderson Greenwood Type 95 Valve consists of a main valve and pilot. The main
valve has an unbalanced piston with O-ring seat. Tank pressure is applied to the top of
the piston by means of the pilot. The area of the top of the piston is larger than the
bottom and the valve remains closed.
When the tank pressure increases to the set pressure of the pilot, the pilot opens and
vents the pressure from the top of the piston. The force acting on the bottom of the
piston is now greater than that acting on the top and the valve opens.
When the tank pressure decreases to the closing pressure of the pilot, the pilot closes
and tank pressure is directed to the top of the piston. The force acting on the top of the
piston is now greater than the force on the bottom and the valve closes.

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
page 2 ANGMC-6026-US-1312 Copyright © 2013 Pentair
Engineering Doc. #05.9040.083 Rev. E
FIGURE 1
P (Tank)
P (Tank)
Fiel test
Auxiliary
setting
evice
Bonnet
vent
Check
valve
Tank pressure
sense line
Main
valve
Unbalance
Piston
Dome
(top of the piston)
Pilot vent
Pilot
Inlet
(tank pressure)
O-ring seat
Outlet
TABLE OF CO TE TS
1.0 General valve description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2.0 Accessory maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.0 Main valve maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4.0 Pilot maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
5.0 Pilot set pressure adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.0 Pilot set pressure field test procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
7.0 Valve diagnosis guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.0 Soft goods repair kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
Copyright © 2013 Pentair ANGMC-6026-US-1312 page 3
Engineering Doc. #05.9040.083 Rev. E
2.0 ACCESSORY MAI TE A CE (REFER TO FIGURE 2)
The accessories used on the Type 95 are the auxiliary setter, field test and backflow
preventer. The field test and backflow preventer are always used; the auxiliary setter
is optional.
Only the backflow preventer, which consists of one (2) diaphragm type check valve and a
ball check valve requires maintenance. Normal maintenance is to clean the check
valves and replace the diaphragm, washer, gasket, (1) and O-ring.
When replacing the diaphragm, care should be taken not to damage the diaphragm. To
assemble the diaphragm type valve, uniformly tighten the body bolts, first one side, then
the opposite side. Do not overtighten the bolts as this will distort the diaphragm and
cause leakage.
OTES: (1) Gasket used on some check valves. f check valve has gasket, use gasket
supplied in repair kit - otherwise discard kit gasket.
(2) Some earlier model valves use two diaphragm check valves and no ball check valve.
ITEM DESCRIPTIO
*1 Auxiliary setting device
2 Supply tubing
3 Pilot exhaust tubing
4 Pilot bracket bolt
*5 Pilot
6 Pipe nipple
7 Field test hand valve
8 Field test plug
9 Connector
10 Check valve
11 Connector
12 Connector
13 Close tee
15 Check valve
16 Connector
17 Connector
18 Pipe plug
19 Body bolt
20 Lock washer
21 Upper body
* 22 Diaphragm
* 23 Washer
24 Spring pin
25 Lower body
26 Body
27 Spring
28 Ball
29 O-ring
(1) 30 Gasket
* Recommended spare parts for repairs
Auxiliary setter, with field test and backflow preventer
indexed in order of disassembly
FIGURE 2

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
page 4 ANGMC-6026-US-1312 Copyright © 2013 Pentair
Engineering Doc. #05.9040.083 Rev. E
ITEM DESCRIPTIO
10 Lower bracket
20 Upper bracket
30 Bracket bolt
40 Washer
50 Hex nut
100 Body
110 Screw
140 Piston
150 Seat retainer
200 Washer (used on 6 x 8 only)
210 Cap/liner
420 Bolt
460 Nozzle
520 Nut
550 Washer
* 560 Guide seal
* 610 O-ring seat
* 620 Cap gasket
* 630 Nozzle gasket
* 640 Washer
700 Cap bolt - hex
710 Cap bolt - eye (1)
* Recommended spare parts for repairs
(1) not shown – used on ≥ 4"
3.0 MAI VALVE MAI TE A CE
(REFER TO FIGURE 3)
Normal valve maintenance will be to only
clean the parts. t may also be necessary
to replace the seat. The piston seal should
not need to be replaced. f the piston seal
is removed, a new seal must be installed.
The piston can be removed from the
cap/liner by pulling the piston out or by
pushing it out with a rod through the hole
in the top of the cap/liner.
No lubricant is required on the piston
seal. A small amount of thread sealant
should be used on the pipe threads to
prevent leakage. Teflon®tape is
recommended.
The piston should be assembled to the
cap/liner and the two parts should then be
assembled to the valve body. The piston
can be prevented from sliding out of the
cap/liner during assembly by covering or
plugging the hole in the top of the
cap/liner.
For marine service, the bolts in the
main valve and pilot exposed to the
environment should be replaced
during routine maintenance ever five
Indexed in order of disassembly
FIGURE 3

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
Copyright © 2013 Pentair ANGMC-6026-US-1312 page 5
Engineering Doc. #05.9040.083 Rev. E
4.0 PILOT MAI TE A CE (REFER TO FIGURE 4A)
Anderson Greenwood recommends the pilot be returned to the factory for repair or to
be repaired by a factory serviceman in the field.
Normal maintenance is to completely disassemble the pilot and replace all the
diaphragms, seals and seat. To facilitate assembly, place all parts removed in an
orderly arrangement so that the correct parts are assembled in the proper sequence.
No lubricants are required in the pilot. A small amount of thread sealant should be
used on the pipe threads to prevent leakage. Teflon®tape is recommended.
Assembly is done in the reverse order of the disassembly. The following items should
be observed when assembling the pilot:
• The round metal diaphragm is the sense diaphragm. The clear teflon diaphragm is
the boost diaphragm.
• The holes in the spindle diaphragm must be aligned with all the holes in the body.
The small hole in the lower case must be aligned with the hole in the body.
• Two of the six case bolts must be assembled through the holes in the lower case
before it is attached to the body. After attachment there is insufficient clearance to
do so.
• Tighten the spindle nut snugly but not excessively. Three diaphragms are
sandwiched in the spindle/stack assembly and excessive tightening will damage
them. Hold the hex spacer when torquing the spindle nut to prevent the stack
from rotating.
After the pilot is assembled the set pressure must be adjusted. Refer to Section 5.0
for instructions.
Refer to Page 10 for Soft Goods Repair Kits Part umbers.
ITEM DESCRIPTIO
100 Body
110 Nozzle
120 Hex spacer
130 Boost spacer
140 Sense spacer
150 Sense plate
160 Boost plate
170 Spindle spacer
190, 190A Pressure adjuster lock nut
200, 200A Bonnet assembly (1)
210 Upper diaphragm case
220 Lower diaphragm case
230 Spacer ring
235A Adapter
240 Case bolt
250 Lock washer
260 Hex nut
320 Boost tube
330 Connector elbow
340 Body bolt
350 Blowdown needle
370 Hex jam nut
For Figures 4A and 4B
ITEM DESCRIPTIO
380 Retainer plug
390 Blowdown bushing
400 Filter screen (not shown)
420 Retainer seat
430 Retainer ring
440A Hex nut
450 Bonnet insert (1)
460 Wire (not shown)
470 Seal – 1/2" diameter (not shown)
490 Washer shim (for stack height)
500 Spindle diaphragm*
510 Sense/boost diaphragm*
520 Sense diaphragm*
550 Spindle
555A Extension rod
560 Check plate
570 Seat
580, 580A Bonnet gasket*
610 Body bolt seal*
620 Blowdown seal*
630 Bushing seal*
640 Case gasket*
ITEM DESCRIPTIO
660 Spindle seal*
680 Spindle gasket*
690 Spindle diaphragm gasket*
730 Seat base – Type 95
740 Ball
750 Hex nut
760, 760A Cap
770, 770A Bonnet bolt
780 Lock washer
790, 790A Pressure adjustment screw
800 Vent – body (not shown)
805A Vent – plug
810 Vent – connector
815 Vent – tube
820, 820A Spring washer
830, 830A Spring disc
840, 840A Spring
A = Used in Auxiliary Setter
* Recommended spare parts for repairs
(1) Part of tem 200 Assembly

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
page 6 ANGMC-6026-US-1312 Copyright © 2013 Pentair
Engineering Doc. #05.9040.083 Rev. E
Type 95 pilot with auxiliary setter
FIGURE 4A

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
Copyright © 2013 Pentair ANGMC-6026-US-1312 page 7
Engineering Doc. #05.9040.083 Rev. E
FIGURE 4B

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
page 8 ANGMC-6026-US-1312 Copyright © 2013 Pentair
Engineering Doc. #05.9040.083 Rev. E
Type 95 pilot test set-up
5.0 PILOT SET PRESSURE ADJUSTME T (REFER TO FIGURE 5)
To adjust the opening and closing pressure of the pilot after the pilot has been
completely disassembled and reassembled, a test set-up similar to that shown in
Figure 5 should be used.
5.1 Check the position of the blowdown adjustment screw. t should be turned half
way in (approximately 5 turns).
5.2 With the pressure adjustment screw turned most of the way in, increase the
supply pressure to the desired set pressure. Back the pressure adjustment
screw out until the pilot “snaps” open. The dome pressure should decrease to
25% or less of the supply pressure.
When the pilot opens and flows, the supply pressure will decrease due to the
pressure drop in the lines to the accumulator. The set pressure is the highest
pressure recorded on the supply pressure gauge.
5.3 Decrease the supply pressure to the correct reseat pressure and back the
blowdown adjustment screw out until the dome pressure “snaps” back. The
supply pressure at which this occurs is the reseat pressure and it should be
about 90% of the set pressure.
When the pilot reseats, the supply pressure will increase due to reduced flow
through the supply line. The reseat pressure will be the lowest pressure read
on the supply gauge. Tighten the jam nut after each setting for accurate readings.
Recycle the pilot valve to verify the settings. A small interaction between the
blowdown adjustment and the pressure adjustment will occur.
1/2" [1.5 mm] pipe
Accumulator
(1/4Cubic Ft.)
Primary set
pressure
a justment
un er cap
Blow own
a justment
Dome
pressure
gauge
Vent
Supply
pressure
Supply
Supply port
Auxiliary set
pressure
a justment
un er cap
1/2" [1.5 mm] pipe
6" to 12" long
FIGURE 5

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
Copyright © 2013 Pentair ANGMC-6026-US-1312 page 9
Engineering Doc. #05.9040.083 Rev. E
6.0 PILOT SET PRESSURE FIELD TEST PROCEDURE (REFER TO FIGURE 6)
This procedure is for measuring the pressure where the valve will open. t will not
measure where the valve closes. To measure the closing pressure, use the procedure in
Section 5.0.
6.1 Remove the pilot discharge tube from the pilot and replace with a cap that has
a .06" diameter [1.5 mm] hole in it.
6.2 Connect the test equipment to the field test valve.
6.3 With the metering and vent valve closed, open the gas bottle and adjust the
regulator pressure to about 200 psi [14 kp/cm2].
6.4 Open the field test valve. Slowly open the metering valve and observe the test
gauge. ncrease the pressure until gas flow at the pilot discharge fitting increases
rapidly. The pressure at which this occurs is the set pressure of the valve.
6.5 To adjust the opening pressure turn the spring adjusting screw under the
cap/adapter “ N” to increase pressure or “OUT” to decrease pressure.
6.6 The MO ( nternational Maritime Organization) Rule set pressure tolerances are:
+ 10% 0 - 21.3 psi [0 - 1.5 kp/cm2]
+ 6% 21.3 - 42.7 psi [1.5 - 3.0 kp/cm2]
+ 3% 42.7 psi or 3.0 kp/cm2and above
Type 95 pilot recommended field test set-up
A apter fitting to
1/2" NPT port on
fiel test valve
Primary set
pressure
a justment
un er cap
Nitrogen
bottle with
shutoff
valve an
regulator
Bonnet
vent
Pilot
Fiel
test
valve
Test gauge
Metering
valve
Auxiliary set
pressure
a justment
un er cap
High
pressure
hose
Vent
valve
Unscrew here
for removal
(install han -tight only –
lubricate threa s)
Pilot
ischarge
fitting
Auxiliary setter
Pilot
ischarge
tube
Main valve
FIGURE 6

A DERSO GREE WOOD TYPE 95 POSRV
MAINTENANCE INSTRUCTIONS
page 10 ANGMC-6026-US-1312 Copyright © 2013 Pentair
Engineering Doc. #05.9040.083 Rev. E
7.0 VALVE DIAG OSIS GUIDE
Problem Causes
Valve does not close (Refer to Figure 1)
on start-up with little or ain valve piston in lift position,
no cargo tank pressure pressurize dome through field test
handvalve [0.5 to 1.0 kp/cm2] to
close piston.
Valve opens at a Set pressure incorrect
pressure below
nameplate set pressure Auxiliary setter device incorrect
one for valve.
Auxiliary setter device not screwed
down all the way.
Pilot sense diaphragm leaks. Check
for gas flow through pilot spring
bonnet vent.
Backflow preventer check valve
leaks. (Item 15, Figure 2) Check
for gas flow at discharge tube to
main valve outlet. No gas flow
should be detected.
Valve opens at Pilot not sensing correct tank pressure
correct pressure
but does not close Check valve in tank pressure sense
line (Figure 1) restricted.
Filter screen in pilot or small orifices
in pilot restricted.
IMPORTANT
N AN EMERGENCY, MA N VALVE
CAN BE CLOSED BY PRESSUR Z NG
DOME (TOP OF P STON) THROUGH
CLOSE TEE ( TEM 13, F GURE 2) REMOVE
PLUG ( TEM 18) AND APPLY PRESSURE
EQUAL TO TANK PRESSURE.
8.0 REPAIR KITS
Soft goods Bolt
Main valve size kit part number kit part number
2 x 3 04.4744.810 04.4744.330
3 x 4 04.4744.804 04.4744.331
4 x 6 04.4744.834 04.4744.332
6 x 8 04.4744.835 04.4744.333
Pilot 04.4744.025 04.4744.333
Backflow preventer (diaphragm) 04.4744.781 04.4744.335
Check valve (ball check) 04.4744.782 None