Emerson 310A Installation Guide

Installation Guide
English – May 2002

Type 310A

Introduction

This installation guide provides instructions for installation,
startup, and adjustment. To receive a copy of the instruction
manual, contact your local Fisher Sales
Office or Sales Representative or view a copy at
www.FISHERregulators.com. For further information refer to:

Type 310A Instruction Manual, form 5351, D102068X012.

P.E.D. Categories

This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive 97/23/EC categories. It may also be used out­side of the Pressure Equipment Directive using sound
engineering practice (SEP) per table below.

EZISTCUDORPSEIROGETACEPYTDIULF

)hcni-1(52NDPES

051x001,001,08,05ND

)hcni-6x4,4,3,2(

II,I

1

Specifications

Body Size and End Connection Style

DN 25 (1-inch) body with NPT ends; and DN 50, 80,
100, and 100 x 150 ( 2, 3, 4, or 4 x 6-inch) body
with ANSI Class 300RF or 600RF flanged ends

(1)

(1)

(2)

:

Maximum Inlet and Pilot Supply Pressures

NPT and Class 600RF: 102 bar (1480 psig)
Class 300RF: 51 bar (740 psig)

Maximum Pressure Drop

(1)

NPT and Class 600RF: 98,3 bar (1425 psig)
Class 300RF: 49,6 bar (720 psig)

Main Valve Proof Test Pressure

(1)

All Pressure Retaining Components have been
proof tested per Directive 97/23/EC - Annex 1,
Section 7.4

Maximum Outlet Pressure

(1)

Operating: 51,7 bar (750 psig)
To Avoid Internal Part Damage: 55,2 bar (800 psig)

Exceeding this pressure may result in gas venting
from pilot spring case.

Emergency (Casing): 102 bar (1480 psig) or
maximum inlet pressure whichever is lower.

Outlet Pressure Ranges

See table 1

Minimum Differential Pressure

(1)

1,0 bar (15 psig)

Maximum Temperature Capabilities

Nitrile (NBR) with wiper ring:

–29° to 66°C (–20° to 150°F)

Fluoroelastomer (FKM) with wiper ring:

–18° to 93°C (0° to 200°F)

Fluoroelastomer (FKM) without wiper ring

–18° to 149°C (0° to 300°F)

1. The pressure/temperature limits in this installation guide and any applicable
standard or code limitation should not be exceeded.

Installation

Only qualified personnel should install or service
a regulator. Regulators should be installed,
operated, and maintained in accordance with
international and applicable codes and
regulations, and Fisher instructions.

If the regulator vents fluid or a leak develops in
the system, it indicates that service is required.
Failure to take the regulator out of service
immediately may create a hazardous condition.

Personal injury, equipment damage, or leakage due
to escaping fluid or bursting of pressure-containing
parts may result if this regulator is overpressured
or is installed where service conditions could
exceed the limits given in the Specifications section,
or where conditions exceed any ratings of the
adjacent piping or piping connections.

To avoid such injury or damage, provide pressure­relieving or pressure-limiting devices (as required
by the appropriate code, regulation, or standard) to
prevent service conditions from exceeding limits.

Additionally, physical damage to the regulator could
result in personal injury and property damage due
to escaping fluid. To avoid such injury and damage,
install the regulator in a safe location.

Clean out all pipelines before installation of the regulator
and check to be sure the regulator has not been damaged
or has collected foreign material during shipping. For NPT
bodies, apply pipe compound to the male pipe threads. For
flanged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired, unless otherwise specified, but be sure
flow through the body is in the direction indicated by the
arrow on the body.

Note

It is important that the regulator be installed so that
the vent hole in the spring case is unobstructed at all
times. For outdoor installations, the regulator should
be located away from vehicular traffic and positioned
so that water, ice, and other foreign materials cannot
enter the spring case through the vent. Avoid placing
the regulator beneath eaves or downspouts, and be
sure it is above the probable snow level.

Table 1. Outlet Pressure Ranges

,EGNARERUSSERPTELTUO)GISP(rab

4,1ot96,0

()02ot01

9,6ot96,0

()001ot01

2,71ot9,6

()052ot001

4,14ot2,71

()006ot052

7,15ot6,72

()057ot004

.ylnomgarhpaidtolipelirtinhtiwelbaliavA.1

)1(

D102068XENG

www.FISHERregulators.com

Type 310A

Overpressure Protection

The recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.

Regulator operation below the maximum pressure limitations
does not preclude the possibility of damage from external
sources or debris in the line. The regulator should be inspected
for damage after any overpressure condition.

Startup

The regulator is factory set at approximately the midpoint of
the spring range or the pressure requested, so an initial
adjustment may be required to give the desired results. With
proper installation completed and relief valves properly
adjusted, slowly open the upstream and downstream shutoff
valves.

Pilot supply pressure must be introduced inot the
regulator before introduction of any downstream
pressure, or internal damage may occur due to
reverse pressurization of the pilot and main vavle
components.

Adjustment

To change the outlet pressure, remove the closing cap or
loosen the locknut and turn the adjusting screw clockwise
to increase outlet pressure or counterclockwise to decrease
pressure. Monitor the outlet pressure with a test gauge
during the adjustment. Replace the closing cap or tighten
the locknut to maintain the desired setting.

Taking Out of Service (Shutdown)

To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.

Type 310A Main Valve Parts List

Key Description

1 Case Body
2 Base Body
3 Sleeve
4 Diaphragm Plate
5 Lower Diaphragm Plate

Key Description

6 Diaphragm
7 Split Ring
8 Spring
9 O-Ring
10 Cap Screw
11 Washer
12 Disk Retainer
13 Screw
14 Cap Screw
15 Travel Indicator Rod
16 Bushing
17 O-ring
18 Travel Indicator Scale
19 Wiper Ring
20 Indicator Cap
21 Screw
26 Backup Ring
2 7 Disk
28 Disk Holder
29 Body Gasket
37 Nameplate
38 Drive Screw

Type 32A Pilot Parts List

Key Description

1 Spring Case
2 Spring Case Cap
3 Adjusting Screw
4 Locknut
5 Spring Seat
6 Cap Screw
7 Gasket
8 Diaphragm Plate
9 Diaphragm
10 Cap Nut
11 Diaphragm Spacer
12 Orifice Assembly
13 O-ring
14 O-ring
15 Washer
16 Yoke
17 Adaptor
18 Valve Disk Assembly
19 Bleed Orifice
20 Bleed Valve
21 Nut
22 Pilot Body
23 Piston Guide
25 O-Ring
26 O-Ring
27 Retaining Ring
28 Piston Seat Assembly
29 Piston
30 O-Ring
33 Bushing
34 O-Ring
35 Spring
36 Spring
37 Control Spring
38 Connector
39 Y602-1 Vent Assembly
40 Nameplate
41 Drive Screw
70 Pipe Bushing

2