Fisher Brand R622 Second Stage Low Pressure Gas Regulator
Fisher R600 Series second stage Low Pressure regulators are UL
listed designed to reduce the outlet pressure from a first-stage
regulator in domestic installations. Type R622 is designed for
Two-Stage domestic applications up to 1 400 000 BTU per hour / 15,8
SCMH. Type R622 contains a high performance relief valve and a
large 3/4-inch screened vent to limit downstream pressure to less
than 2 psig / 0,14 bar in an overpressure situation.
Fisher Type R622 second stage regulators are UL listed designed to
reduce the outlet pressure from a first-stage regulator in domestic
installations, commercial, and industrial applications. R622 used
on natural, manufactured gas, or LPG gas.
Features
Compact Design
High Capacity
Protective Inlet Screen
Internal Relief
Light Weight
Inlet and Outlet Pressure Gauge Taps
20-Year Recommended Replacement Life
Specifications
Type R622 (standard): Second-stage regulator with straight-through
body design
Body Sizes and End Connection Styles
1/2" * 1/2" (DN 15* DN 15), NPT
Maximum Inlet Pressure
Operating: 10 psig
Outlet Pressure Range
9 to 13-inches w.c/ 22 to 32mbar
Orifice Sizes
R600 Series (Except R632A and R632E Series): 7/32 inch / 5.6 mm
Pressure Registration
Internal
Temperature Capabilities
-20 to 160°F (-29 to 71°C)
| NO. | Model | Type | Orifice | Spring | Setting Pressure | Inlet Size | Outlet Size |
| 1 | R622-BCF | 2nd stage | 7/32 | 9-13IN W.C | 11"W.C. | 1/2" | 1/2" |
| 2 | R622-BCC | 2nd stage | 7/32 | 6-9IN W.C | 7"W.C. | 1/2" | 1/2" |
| 3 | R622-BCG | 2nd stage | 7/32 | 13-20IN W.C | 14"W.C. | 1/2" | 1/2" |
| 4 | R622-CFF | 2nd stage | 7/32 | 9-13IN W.C | 11"W.C. | 1/2" | 3/4" |
| 5 | R622-DFF | 2nd stage | 7/32 | 9-13IN W.C | 11"W.C. | 3/4" | 3/4" |
| 6 | R622-DFG | 2nd stage | 7/32 | 13-20IN W.C | 14"W.C. | 3/4" | 3/4" |
Installation Location
The installed regulator should be adequately protected from
vehicular traffic and damage from other external sources.
• Install the regulator with the vent pointed vertically down, see
Figure 2. If the vent cannot be installed in a vertically down
position, the regulator must be installed under a separate
protective cover. Installing the regulator with the vent down
allows condensation to drain, minimizes the entry of water or other
debris from entering the vent, and minimizes vent blockage from
freezing precipitation.
• Do not install the regulator in a location where there can be
excessive water accumulation or ice formation, such as directly
beneath a down spout, gutter, or roof line of building. Even a
protective hood may not provide adequate protection in these
instances.
• Install the regulator so that any gas discharge through the vent
or vent assembly is over 3 feet / 0.91 meter horizontally from any
building opening below the level of discharge.
• Install the regulator high enough above ground level at least 18
inches / 45 cm - so that rain splatter cannot freeze in the vent.
Regulators Subjected to Heavy Snow Conditions
Some installations, such as in areas with heavy snowfall, may
require a hood or enclosure to protect the regulator from snow load
and vent freeze over.
