background image

1305 Series

Instruction Manual

D100342X012
October 2009

1305 Series Pressure Reducing Regulators

Figure 1.

  1305 Series Regulator with Tapped Lower

Casing Connection

W3101

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.
Call a gas service person to service the 

unit. Only a qualified 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 

finned inlet adaptor and the orifice 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) orifice diameter. 

Three springs provide 0 to 225 psig (0 to 15,5 bar) 

reduced pressure ranges.

!

WaRnIng

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 

baffle.  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 

orifice, reducing flow 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 

orifice, flow through the body increases, and the 

downstream pressure returns to the setpoint value.

Summary of Contents for Fisher 1305 Series

Page 1: ...me 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 orifice diameter Three springs provide 0 to 225 psig 0 to 15 5 bar red...

Page 2: ...t 3 inches 76 mm in diameter 1 The pressure temperature limits in this Instruction Manual or any applicable code limitations should not be exceeded Specifications Piping Connections Inlet 1 NPT Outlet 1 4 NPT Operative Ambient Temperature Limits 1 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 13...

Page 3: ...E A2531 1 reduced gas to pilots high pressure gas 3 inch 76 mm minimum pipe size Figure 3 Type 1305C Operational Schematic M1038 spring diaphragm baffle valve disk registration hole valve lever inlet adaptor orifice INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE ...

Page 4: ... regulator from system pressure Cautiously release all internal pressure from the regulator before attempting disassembly Parts such as the valve disk orifice diaphragm and O rings wear out even under normal conditions Normal wear of the valve disk and orifice is accelerated by high pressure drops and large amounts of impurities in the flow stream External sources may also cause damage to the regu...

Page 5: ...or corrosion resistant service as detailed in the NACE International standard MR0175 Key Description Part Number 1 Lower Casing Brass standard or NACE 2R139212012 2 Spring Case Brass Type 1305C 1D383113012 Type 1305D standard or NACE 2P195713022 3 Inlet Adaptor 416 Stainless steel 1D900235132 316 Stainless steel NACE 1D9002X0012 4 Orifice 416 Stainless steel 1D900335132 316 Stainless steel NACE 1D...

Page 6: ...5 2 17 20 22 19 18 16 21 C A N ADIAN PATENTS 4 81 542 1952 P S I M A X O U T L E T F I S H E R G O V E R N O R C O M A R S H A L L T O W N I O W A PS I MAX IN LE T U S P A T E N T S 2 5 2 0 3 2 0 6 5 7 8 0 0 5 TYPE Figure 4 1305 Series Regulator CR1399 A ...

Page 7: ...ss steel NACE 1E3827X0012 30 O ring Nitrile NBR optional 1H292306992 Recommended Spare Parts Monel is a mark owned by Special Metals Corporation Key Description Part Number 17 Spring Steel Zinc plated steel Type 1305C 0 to 75 psig 0 to 5 2 bar Blue 1D387227022 0 to 150 psig 0 to 10 3 bar Unpainted 1B788527022 0 to 225 psig 0 to 15 5 bar Red 1D465127142 Type 1305D standard or NACE 200 to 500 psig 1...

Page 8: ...s a mark owned by Fisher Controls International LLC a business of Emerson Automation Solutions The contents of this publication are presented for information purposes only and while 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 ...

Reviews: