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Three-Way Dual Shut-Off Valves0 pages
THREE-WAY DUAL SHUT-OFF VALVES
The function of a Three-Way Valve is to permit replacement of one
of the Pressure Relief Devices, while the other is protecting the
pressure vessel. In this way, a vessel is protected from overpressure during servicing and removal of the Pressure Relief Valve.
The system refrigerant charge is not required to replace a Pressure
Relief Device.
Applications
The 92 Series Three-Way Valves are suitable for use with HCFC and HFC
refrigerants and their associated oils, as well as other industrial fluids noncorrosive to brass and steel.
The 802 Series Three-Way Valves are suitable for use with ammonia, HCFC
and HFC refrigerants and their associated oils, as well as other industrial
fluids non-corrosive to steel.
Main Features
Ÿ
NPT Connections
Ÿ
Proven robust design
Ÿ
Compact
Technical Specifications
92 Series
Maximum working pressure = 675 PSI (46.6 Bar)
Allowable operating temperature = -20°F to +300°F (-29°C to +149°C)
802 Series
Maximum working pressure = 450 PSI (31.0 Bar)
Allowable operating temperature = -20°F to +300°F (-29°C to +149°C)
A
2
2
ΠInlet
Outlet
B
Materials of Construction
The 92 and 802 series valve bodies are made from forged brass and forged
steel respectively. The stem is made from hardened steel. The stem seal
packing is made from graphite based material. The seal cap is made from
molded plastic.
Installation - Notes
C
D
Part No
NPT (inch)
923
925
927
3/8
1/2
3/4
Part No
NPT (inch)
8021A
8022A
8024
8025
*Suitable for ammonia
1/2
3/4
1
1 1/4
E
1
A
2.75
2.75
2.75
92 SERIES
Dimensions (inch)
B
C
2.06
2.50
2.06
2.50
2.06
2.75
D
1.25
1.25
1.38
E
3.60
3.60
3.92
A
3.63
3.63
5.82
5.82
802 SERIES*
Dimensions (inch)
C
3.38
3.38
3.88
3.88
D
1.75
1.75
2.00
2.00
E
5.75
5.75
7.68
7.68
B
2.32
2.32
3.70
3.70
Weight (lbs)
1.15
1.05
1.67
Weight (lbs)
3.21
3.00
7.87
6.92
SAFETY DEVICES
1. Assemble the Three-Way Valve to a vessel using a high strength pipe
nipple.
2. The pipework must not impose loads on the valve. Loads can occur due
to misalignment, thermal expansion, discharge gas thrust, etc.
37
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