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921 Series Pressure Regulator
Brand: Trerice Gauges & ValvesThe Trerice 921 Series Pressure Regulator is fully self-contained and requires no external power source. This regulator requires that a user-supplied pressure sensing line be connected from the controlled point to the diaphragm actuator.
Pressure in this line acts upon the diaphragm to develop the necessary thrust to stroke the valve, thereby maintaining the system at the desired condition.
For pressure reducing applications, the pressure sensing line is mounted downstream, and the valve closes as this sensed pressure increases. Reduced outlet pressure not to be less than 10% of inlet pressure.
For back pressure relief applications, the sensing line is mounted upstream, and the valve opens as the sensed pressure increases.
Suitable for a variety of pressure regulating and pressure reducing applications.
Features- Self-Operating Design
- Spring-Loaded Diaphragm Actuated
- Cast Ductile Iron Housing & Yoke
- ½" - 6" Valve Sizes
Specifications
Actuator Models
- 921PRV: Pressure Reducing Valve
- 921BPR: Back Pressure Relief
Housing
- Cast Ductile Iron, Black Finish
Pressure Plate
- Cast Iron
Diaphragm Material
- Nylon Reinforced Neoprene
Regulated Pressures
- 2-100 psi
Maximum PRV Inlet Pressure
- 1/2" - 2": 200 psi
- 2-1/2" - 6": 125 psi, 200 psi inlet available with Class 250 flanged valve body. Consult Factory
Maximum BPR Set Pressure
- 100 psi
Pressure Connection
- 1/4" NPT
Adjustment Nut
- Steel
Adjustment Screw
- Brass
Adjustment Spring
- Cadmium-Plated Steel
Body Material
- 1/2" - 2": Bronze
- 2-1/2" - 6": Cast Iron
Trim Material
- Stainless Steel
Trim Style
- Quick-Opening
Connection
- 1/2" - 2": Threaded, Malleable Iron Union Ends
- 2-1/2" - 6": Class 125 Flanged
Pressure & Temperature Rating
- 1/2" - 2": 250 psi @ 410° F (210° C)
- 2-1/2" - 6": 125 psi @ 350° F (175° C)