Anderson Greenwood Series 86 Spring Operated Safety Relief Valves (SOSRV), Anderson Greenwood-EN Manuals & Guides

ANDERSON GREENWOOD SERIES 86 SPRING OPERATED SAFETY RELIEF VALVES (SOSRV)

InstallatIon and MaIntenance InstructIons

Before installation these instructions must be fully read and understood

Thisproduct should only be used in accordance
with the applicable operating instructions and
within the application specifications of the
original purchase order. The Installation and
Operational Safety Instructions (available at
Emerson.com/FinalControl) should be fully
read and understood before returning this
product to service after maintenance.

2 VALVE REPAIR (-4, -8 ORIFICE)

Refer to Figure 1

2.1 Disassembly

2.1.1 Relieve spring tension and back
blowdown adjusting screw out two turns.

2.1.2 Remove inlet bushing, bushing seal and
valve internals.

2.1.3 Separate nozzle from guide by hitting top
of spindle on soft surface.

TABLE OF CONTENTS

1. General ........................................................... 1

2. Valve repair (-4, -8 orifice) ............................ 1

3. Valve repair (G, J orifice) ............................... 2

4. Valve adjustment ........................................... 2

5. Seat leakage .................................................. 4

6. Set pressure change ..................................... 4

Installation and Maintenance Instructions
for Anderson Greenwood Series 86 Spring
Operated Safety Relief Valves (SOSRV).
The intent of these instructions is to acquaint
the user with the maintenance of this product.

1 GENERAL

The Anderson Greenwood Type 86 Relief Valve
is a direct acting spring loaded pressure relief
valve for steam service and uses plastic seat
and seals.
The intent of these instructions is to acquaint
the user with the maintenance of this product.
Please read these instructions carefully.

2.2 Repair

2.2.1 Hold spindle by skirt O.D. in soft jaw vise
and replace seat.

2.2.2 Examine nozzle and polish out any
scratches or nicks. Replace if necessary.

2.2.3 To obtain a better seat seal with PTFE at
low set pressures, burnish seat against
nozzle by chucking spindle in lathe and
holding nozzle against spindle. Burnish
with small force and for short time as
PTFE readily deforms.

2.3 Assembly

Assemble in reverse order of disassembly.
Do not lubricate spindle or guide. Make sure
nozzle is fully and evenly seated in guide. This is
a press fit joint. Lubricate threads and adjusting
bolt tip.

2.4 Soft goods repair kit

The part numbers for soft goods repair kits are
listed below. Each kit contains the seat and all
seals for the pressure ranges indicated.

Set pressure (psig) Set pressure (kpag)

Orifice Kit no.

-4 04.4805.035 50 - 235 236 - 720 345 - 1620 1627 - 4964

-8 04.4805.036 50 - 177 178 - 720 345 - 1220 1227 - 4964

Emerson.com/FinalControl

PTFE PEEK PTFE PEEK

© 2017 Emerson. All Rights Reserved.

Engineering Doc. #05.9040.116 Rev. H

VCIOM-06009-EN 18/01

ANDERSON GREENWOOD SERIES 86 SPRING OPERATED SAFETY RELIEF VALVES (SOSRV)

InstallatIon and MaIntenance InstructIons

FIGURE 1 - SERIES 86 (-4 AND -8 ORIFICES)

Seat

Seat retainer
screw

Seat detail

Guide pin

Blow-down
adjustment screw

Seal

Cap

Pressureadjustment
screw

Body

Spring washer

Spring

Spindle

Guide

Outlet

Nozzle

Bushing seal

Set pressure

Orifice

G Above 223 Above 1538 2
J Above 142 Above 979 3

(psig)

Set pressure
(kpag)

Quantity of
guide plugs

specified set pressure is beyond the pressure limit
of the steam facility, the valve can be set on air.

3 VALVE REPAIR (G, J ORIFICE)

Refer to Figure 2

3.1 Disassembly

3.1.1 Relieve spring tension and back
blowdown screw out two turns.

3.1.2 Remove spring bonnet and valve
internals.

Note: a pipe nipple can be attached to

vent holes in top of guide to facilitate
removal (⅛”-NPT: G, ¼”-NPT: J).

3.1.3 Separate nozzle from guide by hitting top
of spindle on soft surface.

3.2 Repair

3.2.1 Hold spindle by skirt O.D. in soft jaw vise
and replace seat.

3.2.2 Examine nozzle and polish seating
surface as required. Replace if necessary.

3.3 Assembly

Assemble in reverse order of disassembly.
Do not lubricate spindle or guide. Make sure
the guide plugs, if used, are flush or below
the top guide surface. Refer to table for plug

Bushing

Inlet

requirements. Make sure nozzle is fully and
evenly seated in guide. This is a press fit joint.
Lubricate threads and adjusting bolt tip.

3.4 Soft goods repair kit

The part numbers for soft goods repair kits are
listed below. Each kit contains the seat and all
seals for the pressure ranges indicated.

4 VALVE ADJUSTMENT

4.1 General

Two adjustments are provided on steam service
valves, one for adjusting the opening pressure
and one for adjusting the closing pressure.

4.2 Set pressure

Where practical, Series 86 valves should be
set using steam. When setting the valve using
steam, turn the spring adjustment screw on
bonnet in most of the way. Increase pressure
to desired level and back out screw until valve
pops. Lock screw with jam nut and retest.
Readjust as required.
If a steam source is not available, or if the

Set pressure (psig) Set pressure (kpag)

Orifice Kit no.

G 04.4805.037 50 - 151 152 - 720 345 - 1041 1048 - 4964
J 04.4805.038 50 - 95 96 - 720 345 - 655 662 - 4964

PTFE PEEK PTFE PEEK

2

ANDERSON GREENWOOD SERIES 86 SPRING OPERATED SAFETY RELIEF VALVES (SOSRV)

InstallatIon and MaIntenance InstructIons

FIGURE 2 - SERIES 86 (G AND J ORIFICES)

Cap

Pressure adjustment
screw

Seal

Spring washer

Bonnet

Spring

Flange bolts

Bonnet retainer ring

Bonnet seal

Seat

Seat retainer
screw

Seat detail

Bonnet flange

Hand lift spindle

Guide

Guide pin

Blowdown adjusting
screw

Seal

Nozzle

Nozzle seal

Inlet

Guide plug

Outlet

See seat detail

Body

Valves for steam service that are set on air must be temperature compensated when adjusting the
set pressure. Because of the high temperature of steam, the set pressure shifts downward as the
spring in the valve heats up. To compensate for this shift the set pressure must be adjusted higher
than the nameplate set when using air as follows:

Nameplate set

Orifice

-4 50 - 350 4.5 345 - 2414

-4 351 - 720 6.0 2414 - 4964

-8 50 - 720 3.4 345 - 4964
G 50 - 720 3 3 45 - 4964
J 50 - 720 1.7 345 - 4964

pressurerange (psig)

% Increase of nameplate

set when using air

Nameplate set

pressurerange (kpag)

4.3 Reseat pressure

To adjust blowdown, turn screw IN to shorten blowdown; OUT to increase blowdown.

NOTE

If volume of test set up is too small, blowdown will be set too short even though pressure gauge indicates it to
be correct. Refer to Section 4.5.

3

ANDERSON GREENWOOD SERIES 86 SPRING OPERATED SAFETY RELIEF VALVES (SOSRV)

InstallatIon and MaIntenance InstructIons

4.4 ADJUSTMENTS: TOLERANCES AND SPECIFICATIONS

Set pressure
range(psig)

Above 70 Above 483 Set pressure ± 3%
70 and below 483 and below Set pressure ± 2 psi or [±1.4 kpag]
100 and above 689 and above Cracking pressure 95% of set
50 to 99 345 to 683 Cracking pressure 90% of set
Below 50 Below 345 Cracking pressure 85% of set
100 and above 689 and above Reseat pressure 93% of set
50 to 99 345 to 683 Reseat pressure 90% of set
Below 50 Below 345 Reseat pressure 80% of set

* Percent tolerance and performance is of specified set pressure

4.5 Adjusting equipment

Where practical, valves should be set using an accumulator large enough to accurately read
and set blowdown. For a -4 and -8 orifice up to 600 psig [4138 kpag], a four foot accumulator is
recommended. The supply pipe to the valve should be the same size as the inlet or larger and not
more than 10” long.
For the G and J orifice valves, or if an accumulator is not available for the sizes listed above,
theblowdown may be set using the following method.
Turn the blowdown adjusting bolt all the way in until it just touches the guide, then turn it out
thenumber of turns listed in the table.

Set pressure
range(kpag)

Valve operating
characteristic Tolerance and performance*

4.6 BLOWDOWN ADJUSTMENT

Orifice size Set pressure (psig) Set pressure (kpag) Turns

-4 50 - 720 345 - 4964 ¼

-8 50 - 720 345 - 4964 1½
G, J 50 - 720 345 - 4964 2

An optional method for adjusting blowdown is the overpressure method. To test with
overpressure, the safety valve must first be set. After the valve is set, the block valve between
the accumulator and safety valve should be closed. The pressure in the accumulator should be
increased to at least a pressure of 110% of actual set pressure.
The block valve should then be opened and actual blowdown read and recorded. The supply pipe to
the safety valve should be the same size as the inlet or larger and not more than 10” long.

5 SEAT LEAKAGE

5.1 General

If the valve leaks after repair check the following:

5.1.1 Full and even seating of nozzle and guide.

5.1.2 Foreign particles trapped between the

seat and nozzle. If any are found they
may have damaged the seat, making it

6 SET PRESSURE CHANGE

If the set pressure is changed more than ± 5%
from the nameplate set pressure, the spring,
spring washers, spring bonnet, guide plugs and
seat may also have to be changed. Consult the
factory or refer to the soft goods repair kit, the
table in Section 3.3 and spring chart 03.0079.

necessary to replace it.

5.1.3 Correct seat material for the valve set
pressure.

Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Anderson 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. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.

Emerson.com/FinalControl

4