Emerson 1305 Instruction Manual

Instruction Manual
Form 1095

October 2009

1305 Series

1305 Series Pressure Reducing Regulators

WARNING

!

Fisher® regulators must be installed,
operated, and maintained in accordance
with federal, state, and local codes, rules
and regulations, and Emerson Process
Management Regulator Technologies,
Inc. instructions.

If the regulator vents gas or a leak
develops in the system, service to
the unit may be required. Failure
to correct trouble could result in a
hazardous condition.

W3101

Call a gas service person to service

the unit. Only a qualied person must

install or service the regulator.

Introduction

The 1305 Series regulators are direct-operated,
pressure-reducing regulators that resist hydrate
formation and regulator freeze-up. Regulator
freeze-up resistance occurs as the pipeline gas

warms the nned inlet adaptor and the orice area.

As the gas cools within the inlet adaptor due to
pressure drop and volume expansion, the warm inlet
adaptor helps keep the gas temperature above the
freezing point of water and the hydrate formation
temperature. The regulators are suitable for service
with natural gas, air, propane, and other gases
compatible with the internal parts.

Type 1305C—1 NPT inlet and 1/4 NPT outlet

connections; 5/64-inch (2,0 mm) orice diameter.

Three springs provide 0 to 225 psig (0 to 15,5 bar)
reduced pressure ranges.

Figure 1. 1305 Series Regulator with Tapped Lower

Casing Connection

Type 1305D—same as Type 1305C except with larger
spring case and just one heavy spring for reduced
pressure range of 200 to 500 psig (13,8 to 34,5 bar).

Principle of Operation

Downstream pressure is sensed by the diaphragm
(see Figure 3) through a registration hole in the

bafe. When downstream pressure rises, pressure

under the diaphragm overcomes the spring
compression and moves the valve lever upward.
This action pushes the valve disk closer to the

orice, reducing ow through the body. Downstream
pressure returns to the setpoint value. When

downstream pressure decreases, the opposite action
takes place. The valve disk moves away from the

orice, ow through the body increases, and the

downstream pressure returns to the setpoint value.

www.emersonprocess.com/regulators

D100342X012

1305 Series

Specications

Piping Connections

Inlet: 1 NPT
Outlet: 1/4 NPT

Operative Ambient Temperature Limits

-20° to 200°F (-29° to 93°C)

Maximum Emergency Outlet (Casing) Pressure

Type 1305C: 250 psig (17,2 bar)
Type 1305D: 550 psig (37,9 bar)

Outlet Pressure Ranges

Type 1305C

With Spring 1D387227022 (Blue):
0 to 75 psig (0 to 5,2 bar)
With Spring 1B788527022 (Unpainted):
0 to 150 psig (0 to 10,3 bar)

With Spring 1D465127142 (Red):

0 to 225 psig (0 to 15,5 bar)

Type 1305D: 200 to 500 psig (13,8 to 34,5 bar)

Maximum Allowable Inlet Pressue

4000 psig (276 bar)

(1)

(1)

Maximum Operating Outlet Pressure

Type 1305C

With Spring 1D387227022 (Blue):
75 psig (5,2 bar)
With Spring 1B788527022 (Unpainted):
150 psig (10,3 bar)
With Spring 1D465127142 (Red):
225 psig (15,5 bar)
Type 1305D: 500 psig (34,5 bar)

Orice Size

5/64-inch (2,0 mm)

Construction Materials

Lower Casing: Brass
Spring Case: Brass

Orice: 416 Stainless steel

Valve Stem: 416 Stainless steel
Valve Disk: Nylon (PA)
O-rings: Nitrile (NBR)

NACE Construction

Lower Casing: Brass
Spring Case: Brass

Orice: 316 Stainless steel

Valve Stem: 316 Stainless steel
Valve Disk: Nylon (PA)
O-rings: Nitrile (NBR)

1. The pressure/temperature limits in this Instruction Manual or any applicable code limitations should not be exceeded.

The 1305 Series regulator inlet is installed directly

in a high-pressure, warm-gas ow line. Heat from
this line is transmitted through the ns in the inlet

adaptor. The temperature of the reduced pressure
gas is raised high enough to prevent formation of
condensate and regulator freeze-up.

Installation

After the regulator has been removed from the
shipping container, inspect the regulator for shipping
damage. Be sure the body and connecting pipeline
are free of foreign material. Coat external threads
with a good grade of pipe compound. The regulator

can be installed in any position. To position the
regulator, loosen the union nut (key 8, Figure 4) and
turn the regulator to the desired position. Tighten
the union nut.

Install these regulators as shown in Figure 2. Weld

a 1-inch (25 mm) pipe coupling on the high-pressure,
warm temperature supply line. Screw the inlet adaptor
(key 3, Figure 4) into this pipe coupling so that the inlet

and orice are directly in the main ow line.

The main ow pipeline must be at least

3-inches (76 mm) in diameter.

Note

2

REDUCED GAS
TO PILOTS

AE2715-E
A2531-1

HIGH-PRESSURE GAS
3-INCH (76 mm)
MINIMUM PIPE SIZE

1305 Series

M1038

REGISTRATION
HOLE

Figure 2. Installation of Type 1305 Regulator

SPRING

DIAPHRAGM

INLET
ADAPTOR

VALVE
DISK

BAFFLE

VALVE
LEVER

ORIFICE

INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE

Figure 3. Type 1305C Operational Schematic

3