Bulletin LP-7:R222
Type R222 Second-Stage Regulator
Introduction
The T ype R222 is an Underwriters Laboratories (UL®)
listed regulator designed for T wo-Stage LP-Gas systems.
The unit is designed to reduce the outlet pressure from
a rst-stage regulator (usually 10 psig / 0.69 bar) to an
outlet pressure of 11-inches w.c. / 27 mbar. The unit’s
capacity, up to 650,000 BTU/hour, is sized for small
domestic loads. The units compact size makes it ideal for
tight t applications. A screened drip-lip vent is oriented
over the inlet in the standard conguration.
Features
• 20 Year Recommended Replacement Life—The
Type R222 is designed using rugged time proven
design concepts and constructed of corrosion
resistant materials, both internally and externally.
With proper installation and periodic inspection and
maintenance, the Type R222 regulator will meet a
20 Year Recommended Replacement Life.
• Dual Gauge Taps—Built-in 1/8-inch threaded NPT
gauge taps, oriced to a number 54 drill size on the
inlet and outlet side of the regulator allow for easy
gas system checks.
• Durability—The design utilizes the same
durable valve stem linkage design used in
R600 Series regulators for reliable lockup and
regulation performance.
Figure 1. Type R222 Second-Stage Regulator
• Superior Overpressure Protection—The
combination of a high capacity relief valve and
large vent provide overpressure protection which
exceeds UL standards and is capable of limiting the
downstream pressure to 2 psig / 0.14 bar even in a
double failure situation when used with a Fisher
Type R122H or R622H rst-stage regulator.
• Corrosion-Resistant—Added corrosion resistance
from an internal and external coating process for
all castings prior to painting, stainless steel relief
valve spring and retainer and a corrosion resistant
relief valve seat.
December 2012
• Improved Regulation—A large fabric-reinforced
diaphragm delivers accurate and stable regulation.
• Easy Installation—The units compact size and
easily accessible inlet and outlet wrench ats
make installation easy even in the tightest locations.
Optional vent orientation with the vent oriented over
outlet is available.
www.sherregulators.com
• Positive Draining Spring Case—When installed
properly with the spring case vents pointed down,
the design allows moisture formed in the spring
case to drain out limiting the problems with
corrosion and freezing water in the spring case.
D450154T012
Bulletin LP-7:R222
3/8-18 NPT
SCREENED VENT
1/8-27 NPT
INLET/OUTLET
GAUGE TAPS
NO. 54 RESTRICTED
1/2-14 NPT
INLET FITTING
1.1 /
27.9
4 /
102
6.5 /
165
Figure 2. Type R222 Dimensions
Table 1. Ordering Information
TYPE NUMBER
R222-BAF
R222-BAFXA
1. Capacity is based on 10 PSIG / 0.69 bar inlet pressure and 2-inches w.c. / 5 mbar droop.
2. Spring case vent over outlet.
(2)
CAPACITY, BTU/HOUR
PROPANE
(1)
650,000 1/2 x 1/2-inch NPT
CONNECTIONS
INLET X OUTLET
1.0 /
25.4
OUTLET PRESSURE
11-inches w.c. /
SETTING
27 mbar
4.5 /
114
1/2-14 NPT
0.9 /
22.9
MOUNTING SCREW HOLES
INCHES /
mm
OUTLET PRESSURE
RANGE
9.5 to 13-inches w.c. /
24 to 32 mbar
LP-Gas Equipment
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
For further information visit www.fisherregulators.com
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a business of Emerson Process Management.
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