Fisher Gas Regulator 630 Model
Fisher Gas Regulator Type 630 Big Joe regulators are direct-
operated, spring-loaded, pressure reducing regulators. They are
available in 1 and 2-inch / DN 25 and 50 body sizes, and they are
designed for maximum inlet pressures to 1500 psig / 103 bar and
outlet pressures from 3 to 500 psig / 0.21 to 34.5 bar. The Type
630 can be used with natural gas, air, or a variety of other gases
for such applications as first-stage farm-tap regulators or
high-pressure industrial regulators. The Type 630 can be converted
in the field to a relief valve or is available as the Type 630R
relief valve/backpressure regulator; refer to the separate Type
630R Bulletin (71.4:630R) for information.
• High Pressure Capabilities—Inlet pressures up to 1500 psig / 103 bar and control pressures up
to 500 psig / 34.5 bar.
• Rugged Construction—Compact, sturdy design and solid metal construction provide a
strong, reliable, long-lasting regulator.
• Better Low-Pressure Control—Fisher 630 is available in both high-pressure and low-pressure
constructions; the low-pressure units have a larger diaphragm area
to provide more accurate control of low-pressure settings.
• Sour Gas Service Capability—Optional materials are available for applications handling sour
gases. These constructions comply with the recommendations of the
NACE International MR0175.
1 and 2-inch / DN 25 and 50
End Connection Style
NPT, ASME CL150 RF, CL300 RF, or CL600 RF
Maximum Inlet Pressure and Pressure Drops
Up to 1500 psig / 103 bar, See Table 1
Maximum Outlet Pressure
Up to 500 psig / 34.5 bar, See Table 2
Outlet Pressure Ranges
3 to 500 psig / 0.21 to 34.5 bar, See Table 2
Body: Cast iron, or steel
Spring Case and Diaphragm Adaptor:
Cast iron or steel
Orifice: Brass or stainless steel
Valve Disk: Nitrile (NBR), Nylon (PA), Polytetrafluoroethylene (PTFE),or
Valve Disk Holder: Brass or stainless steel Valve Carrier: Brass or stainless steel
Diaphragm: Neoprene (CR) or Fluorocarbon (FKM)
Inlet Body Gaskets: Copper with brass trim or stainless steel with stainless steel
All Other Gaskets: Composition
Lever: Zinc-plated steel or Stainless steel
Diaphragm Connector: Aluminum with brass trim or stainless steel with stainless steel
Pitot Tube: Stainless steel
Regulator Spring: Plated steel
Adjusting Screw: Steel
Diaphragm Plate: Zinc-plated steel
Upper Spring Seat: Zinc
Lower Spring Seat: Zinc-plated steel (low pressure) or Zinc (high pressure)
Vent: Type Y602-9
Spring Case Vent
PTFE diaphragm protector, wire-seal adjusting screw, and NACE
These regulators may be installed in any position. Some
installations may require a remote vent line. Protect all vent
openings against the entrance of rain, snow, debris, or any other
foreign material that may plug the opening.
Direction of flow through the regulator body must be in the
direction indicated by the flow direction arrow found on the
As is the case with most regulators, these regulators have an
outlet pressure rating that is lower than the inlet pressure
rating. Overpressure protection is needed if the actual inlet
pressure can exceed the outlet pressure rating.
Regulator operation below the limits specified in Tables1 and 2 do
not preclude the possibility of damage from external sources or
from debris in the pipeline. The regulator should be inspected for
damage after any overpressure condition.