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Bulletin 71.1:R622
Type R622 Pressure Reducing Regulator
• Compact Desian
• Prote
Scree
• Inlet and Outlet Pressure Gauge Taps
Figure 1. Type P622 Pressure Reducing Regulator
Introduction
Type R622 direct -operated. spring -loaded regulators
provide economical pressure reducing control in
a variety of residential, commercial. and industrial
FISHER`
June 2010
Relief
Veight
applications. These regulators can be used with
natural, manufactured, or propane gases and have the
same inlet and outlet pressure capabilities.
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EMERSON.
Bulletin 71.1: R622
Specifications
Body Size and End Connection Style0)
1 /2 NPT inlet and outlet
Maximum Allowable Inlet Pressure0)
Operating: 125 psig (8,6 bar)
Emergency: 125 psig (8,6 bar)
Except 1.8 to 2.2-inches w.c. (4 to 5 mbar) spring
range which has operating and emergency
pressures of 60 psig (4,1 bar)
Maximum Allowable Outlet (Casing) PressureM
Operating to Avoid Internal Part Damage:
3 psid (0.21 bar d) above outlet pressure setting
Emergency: 20 psi (1 A bar)
Outlet Pressure Ranges
See Table 1
Orifice Size
1/8-inch (3,2 mm) orifice
Flow Coefficients
Wide -Open C. for Relief Sizing: 12.5
Wide -Open Cv for Relief Sizing: 0.36
Cl: 35
IEC Sizing Coefficients
XT: 0.78
FO: 0.82
FL: 0.89
Flow Capacities
See Table 2
Pressure Registration
Internal
Relief Performance
See Figure 4
Internal Relief Performance
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 Connections
3/4 NPT with removable screen
Temperature Capabilities(')
-200 to 160°F (-29° to 71 °C)
Approximate Weight
2.35 pounds (1 kg)
Construction Materials
Body, Spring Case, Diaphragm Plate, and
Orifice: Aluminum
Diaphragm, Disk, and O-ring: Nibile (NBR)
Adjusting Screw and Pushpost: Delrin®
Closing Cap: ASA Thermoplastic (UV -Ray Resistant)
Control Spring: Zinc -plated steel
Machine Screw, Spring Seat,
and Lever: Zinc -plated steel
Valve Stem: Zinc
Relief Valve Spring, Relief Spring Retainer,
Lever Pin, and Vent Screen: Stainless steel
1. The presstveltemperat m bmtts to this Bulletin or any applicable stanaard limitation should not be exceeded.
DeumG is a mark owned by E.I. du Pont de Nemours and Co.
In addition, Type R622 regulators have internal relief
across the diaphragm to help minimize overpressure.
Any outlet pressure above the start -to -discharge point
of the non-adjustable relief valve spring moves the
diaphragm off of the relief valve seat, allowing excess
pressure to bleed out through the screened spring
case vent.
Table 1. Outlet Pressure Ranges
Specifications
The Specifications section lists specifications for Type R622
Pressure Reducing Regulators. As it originally comes
from the factory, specifications for a given regulator
are stamped on the spring case nameplate.
OUTLET PRESSURE RANGE
CONTROL SPRING PART
NUMBER
CONTROL SPRING
COLOR CODE
SPRING WIRE DIAMETER.
INCHES (mrn)
SPRING FREE LENGTH.
INCHES (aim)
I A to 2.2-tndles w.c. (4 to 5 mbar)
T 14453T0012
Purple
0.051 (1,30)
3.40 (86.4)
5 to 7-tnches w.c. (12 to 17 mbar)
T14398MO12
Orange
0.062 (1,58)
3.40 (86.4)
6.5 to 9-tnches w.c. (16 to 22 mbar)
T 14399T0012
Yellow
0.067 (1,70)
3.61 (91,7)
9 to 134ndtes w.c. (22 to 32 mbar)
T 14400T0012
Silver
0.072 (1.83)
4.10 (104)
13 to 204nches w.c. (32 to 50 mbar)
T14401T0012
Gray
0.080 (2.03)
3.60 (91,4)
16 t0 Winches w.C. (40 to 87 mbar)
T 14402T0012
Pink
0.093 (2,36)
3.52 (89.4)
1 to 2.2 psig (69 to 152 mbar)
T14403T0012
Light Blue
0.105 (2.67)
3.66 (93.0)