Data Sheet

24
Types R122H and R622H First-Stage Regulators are Underwriters
Laboratories (UL
®
) listed regulators designed for Two-Stage
LP-Gas Regulator systems. These First-Stage regulators reduce
tank pressure to a lower pressure (usually 10 psig / 0.69 bar) for a
Second-Stage regulator. Fisher
®
brand First-Stage regulators are
painted red for easy identi cation. Vents are screened with standard
orientation over the outlet. The Types R122H and R622H regulators
have a temperature rating of -20 to 160°F / -29 to 71°C, but have
passed Fisher internal testing for lockup, relief start-to-discharge
and reseal down to -40°F / -40°C.
Type R122H – Designed for use as a First-Stage regulator for
domestic applications, the Type R122H’s size makes it perfect for
tight installations. Stainless steel internal parts and corrosion resistant
coatings provide a recommended replacement life of 20 years. Its
non-adjustable setpoint makes the unit virtually tamper proof. Inlet and
outlet gauge taps allow easy system testing. Large inlet and outlet
wrench fl ats provide for easy installation, even in underground tanks.
The outlet pressure setpoint remains at a nominal factory setting of
10 psig / 0.69 bar. The designs superior relief performance exceeds
UL requirements and provides double failure overpressure protection
when used with R600 Series Second-Stage regulator. The unit’s
Fluorocarbon (FKM) valve disc provides better lockup performance
and durability in contaminated gas. The vent is with
3/8-inch NPT for easy installation of vent piping. A large fabric-
reinforced diaphragm provides accurate regulation. The large ori ce
assists in minimizing freeze problems.
Type R622H – Time proven design constructed of corrosion-
resistant and wear-resistant materials, the Type R622H is designed
to provide a recommended replacement life of 20 years. Built-in
1/8-inch FNPT gauge taps on both the inlet and outlet pressure
sides allow for easy system checks. A large 3/4-inch FNPT drip-lip
vent reduces the chance of blockage by freezing rain or sleet when
properly installed with the vent pointing down. Each Type R622H
is equipped for overpressure protection with a corrosion-resistant
internal relief valve that provides high capacity relief and a travel
stop on the closing cap. Its size and con guration make it ideal for
under-the-dome installations.
First-stage regulators
First-Stage Regulators
TYPE NUMBER
CAPACITIES (PROPANE)
(1)(3)
INLET
CONNECTION,
INCH
OUTLET
CONNECTION,
INCH
OUTLET
ADJUSTMENT RANGE
OUTLET
PRESSURE SETTING
BTU / hour SCMH psig bar psig bar
R122H-AAJ
1,100,000 12.4 1/4 FNPT 1/2 FNPT Non-Adjustable 10 0.69
R122H-AAJXB
(2)
R622H-BGK
2,000,000 22.5
1/2 FNPT
1/2 FNPT
4 to 6
0.28 to
0.41
5 0.34
R622H-HGK FPOL
R622H-JGK 2,250,000 25.3 FPOL 3/4 FNPT
R622H-BGJ 2,100,000 23.6 1/2 FNPT 1/2 FNPT
8 to 12
0.55 to
0.83
10 0.69
R622H-DGJ 2,400,000 27.0 3/4 FNPT 3/4 FNPT
R622H-HGJ 2,100,000 23.6
FPOL
1/2 FNPT
R622H-JGJ 2,250,000 25.3 3/4 FNPT
1. Based on 30 psig / 2.1 bar inlet pressure and 20% droop.
2. Vent over gauge taps.
3. Metric conversion is based on 2516 BTU/ft
3
of gas at 60°F / 16°C.
TYPE R622H
TYPE R122H
TYPE R622H