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www.emersonprocess.com/regulators

Type R622

D10309

3

X012

Instruction Manual
Form 5782

October 2009

Type R622 Pressure Reducing Regulator

Figure 1.  Type R622 Regulator

!

WaRning

Failure to follow these instructions or 
to properly install and maintain this 
equipment could result in an explosion 

and/or fire causing property damage and 

personal injury or death.

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.

For LP-g as service, an approved 
regulator (such as one listed by UL) 
should be used or approved by the 
a uthority Having Jurisdiction.  The 
installation in most states, must comply 
with nFPa  58 standard.

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

Scope of the Manual

This manual provides instructions for the installation, 
adjustment, maintenance, and parts ordering information 
for the Type R622 pressure reducing regulator.  

Product Description

Type R622 direct-operated, spring-loaded regulators 
provide economical pressure reducing control in 
a variety of residential, commercial, and industrial 
applications.  These regulators can be used with 

natural, manufactured, or liquefied petroleum gases and 

have the same inlet and outlet pressure capabilities. 

W8806

Summary of Contents for R622

Page 1: ...aving Jurisdiction The installation in most states must comply with NFPA 58 standard 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 Scope of the Manual This manual p...

Page 2: ...Start to Discharge is 8 to 22 inches w c 20 to 55 mbar for setpoints from 1 8 to 20 inches w c 4 to 50 mbar Start to Discharge is 140 to 200 over setpoint from 20 inches w c to 2 2 psig 50 to 152 mbar Spring Case Vent Connection 3 4 NPT with removable screen Maximum Temperature Capabilities 1 20 to 160 F 29 to 71 C Approximate Weight 2 35 pounds 1 kg Table 1 Outlet Pressure Ranges outlet pressure ...

Page 3: ...eases Spring force pushes the pusher post assembly downward and the valve disk moves away from the orifice Type R622 regulators include an internal relief valve used to help minimize overpressure Any outlet pressure above the start to discharge point of the non adjustable relief spring moves the diaphragm off of the relief seat allowing excess pressure to discharge through the vent Installation Wa...

Page 4: ...if the piping obstructs the movement of the vent flapper On indoor installations the vent should be piped outside the building see Figure 3 Remove the screen from the regulator vent connection and connect vent piping from that connection to the outdoors Vent piping should be as large in diameter as practical be as short as possible and have a minimum number of bends and elbows Install a weather an...

Page 5: ...re condition on the regulator diaphragm Installation arrangements may vary but in any installation it is important that the valves be opened or closed slowly These steps apply to the typical installation 1 Slowly close the downstream shutoff valve 2 Slowly close the upstream shutoff valve 3 Open vent valves downstream of the regulator 4 Open vent valves upstream of the regulator Maintenance Warnin...

Page 6: ...293T0022 3 Inlet Fitting Aluminum T21176T0BK2 4 Machine Screw Carbon Steel 12 required T13526T0012 5 O Ring Nitrile NBR T14431T0012 13 Inlet Screen 18 8 Stainless steel T14436T0012 16 Relief Spring 302 Stainless steel T13612T0012 17 Diaphragm T21163T0012 18 Pusher Post Acetal T40653T0012 19 Lower Spring Seat Zinc plated steel T14396T0012 20 Relief Spring Retainer 18 8 Stainless steel T13613T0012 2...

Page 7: ...igure 4 Vent Location Position 1 Vent over inlet Position 2 Position 4 Position 3 Vent over outlet 38 13 4 24 33 28 29 30 27 18 1 4 17 19 16 20 22 23 31 25 26 5 3 Figure 5 Type R622 Regulator Assembly T80577 T80577 ...

Page 8: ...aser Emerson Process Management Regulator Technologies Inc 2004 2009 All Rights Reserved Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75069 1872 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai China 201206 Tel 86 21 2892 9000 Europe Bologna Italy 40013 Tel 39 051 4190611 Middle East and Africa Dubai United Arab ...

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