Installation Guide
D102068X014
English – June 2020
Type 310A
Introduction
This installation guide provides instructions for installation,
startup and adjustment. To receive a copy of the instruction
manual, contact your local Sales Office or view a copy at
www.fisher.com. For further information refer to: Type 310A
Instruction Manual, D102068X012.
P.E.D. Categories
This product may be used as a pressure accessory with
pressure equipment in the following Pressure Equipment
Directive categories. It may also be used outside of the
Pressure Equipment Directive using sound engineering
practice (SEP) per table below.For information on the current
PED revision see Bulletin: D103053X012.
PRODUCT SIZE CATEGORY FLUID TYPE
DN 25 / 1 in. SEP
DN 50, 80, 100, 100 x 150 /
2, 3, 4, 4 x 6 in.
III
1
Specifications
Body Size and End Connection Style
DN 25 / 1 in. body with NPT ends; and DN 50, 80,100
and 100 x 150 / 2, 3, 4 or 4 x 6 in. body with CL300 RF
or CL600 RF flanged ends
Maximum Inlet and Pilot Supply Pressures
NPT and CL600 RF: 103 bar / 1500 psig
CL300 RF: 51.7 bar / 750 psig
Maximum Pressure Drop
(1)
NPT and CL600 RF: 98.3 bar / 1425 psig
CL300 RF: 49.6 bar / 720 psig
Maximum Outlet Pressure
(1)
Operating: 48.3 bar / 700 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): 103 bar / 1500 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
(1)
Nitrile (NBR) with wiper ring:
-29 to 66°C / -20 to 150°F
Fluorocarbon (FKM) with wiper ring:
-18 to 66°C / 0 to 150°F
Fluorocarbon (FKM) without wiper ring
-18 to 149°C / 0 to 300°F
(1)
(2)
:
Installation
WARNING
▲
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
pressure-relieving 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 down spouts and be sure it is above
the probable snow level.
Type 310A
Table 1. Outlet Pressure Ranges
OUTLET PRESSURE RANGE
bar psig
0.69 to 1.4
0.69 to 6.9
6.9 to 17.2
17.2 to 41.4
27.6 to 48.3
1. Available with Nitrile (NBR) pilot diaphragm only.
(1)
10 to 20
10 to 100
100 to 250
250 to 600
400 to 700
(1)
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.
CAUTION
△
Pilot supply pressure must be introduced
into the regulator before introduction of any
downstream pressure or internal damage
may occur due to reverse pressurization of
the pilot and main valve 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)
WARNING
▲
To avoid personal injury resulting from
sudden release of pressure, isolate
the regulator from all pressure before
attempting disassembly.
Parts List
Type 310A Main Valve Parts List
Key Description
1 Case Body
2 Base body
3 Sleeve
4 Diaphragm Plate
5 Lower Diaphragm Plate
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
24 Pipe Plug
26 Backup Ring
27 Disk
28 Disk Holder
29 Body Gasket
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 OriceAssembly
13 O-ring
14 O-ring
15 Washer
16 Yoke
17 Adaptor
18 Valve Disk Assembly
19 BleedOrice
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 Type Y602-1 Vent Assembly
40 Nameplate
41 Drive Screw
52 Plug
53 Spacer
66 Sealing Washer
70 Pipe Bushing
71 Pipe Nipple
2
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