Back pressure regulator

Cashco Back Pressure Regulators are designed to maintain upstream pressure by modulating flow. Used across oil & gas, chemical, food, and pharmaceutical sectors, these regulators ensure process integrity, safety, and control accuracy in both low- and high-pressure applications.

Product Categories & Subcategories

• Model 1164 – Pilot-Operated, Low-Pressure
• Model 1171 – Pilot-Operated, High-Pressure
• Model 123 / 123-1-6S – Spring-Loaded
• Model 2171 – Heavy-Duty, Pilot-Operated
• Model 31-B / 3171 – Compact Spring-Loaded
• Model 6987 – Precision Pilot-Operated
• Model 8311 HP / LP – Extended Pressure Control
• Model B2 / B7 – Compact Pilot-Operated
• Model BA1 – Air-Operated Diaphragm
• Model BGR-1 / BGR-2 – Gas Return Regulators
• Model BL1 / BQ – Bleed/Line Regulators
• Model BR – Bypass Regulator
• Model C-BPV / CA Series – Sanitary Regulators
• Model DA5 / DA8 – Dome-Loaded Regulators
• Model SA5 – Sanitary Spring-Loaded

Key Features of Entire Category (Common Features)

• Precise upstream pressure regulation across variable flow rates
• Spring-loaded, pilot-operated, air- and dome-loaded actuator types
• Material options: stainless steel, bronze, carbon steel
• Conformance with ANSI, ASME, and 3A/BPE standards
• Optional soft or metal seats for tight shutoff
• Handles various media: air, steam, inert gas, corrosive fluids
• Service configurations: sanitary, cryogenic, industrial
• Size Range: ½″ to 2″
• Cv Range: 0.01 to 6.0

Category-Wise Quantitative Features

Model 1164 – Pilot-Operated, Low-Pressure

• Inlet Pressure: Up to 250 psig
• Setpoint: 2–50 psig
• Size: ½″
• Cv: ~0.1
• Body: Bronze
• Seat: PTFE
• Leakage Class: VI
• Temp Range: –20 °F to +200 °F

Model 1171 – Pilot-Operated, High-Pressure

• Inlet Pressure: Up to 1,500 psig
• Setpoint: 0.5–500 psig
• Sizes: ½″–1″
• Cv: Up to 0.5
• Body: SST / Carbon Steel
• Seat: PTFE
• Leakage Class: IV–VI
• Temp Range: –20 °F to +250 °F

Model 123 / 123-1-6S – Spring-Loaded

• Inlet Pressure: Up to 1,000 psig
• Setpoint: 10–500 psig
• Sizes: ½″–2″
• Cv: 0.2–2.0
• Body: Bronze / SST
• Seat: Soft / Metal
• Leakage Class: IV–VI
• Temp Range: –325 °F to +450 °F

Model 2171 – Heavy-Duty, Pilot-Operated

• Inlet Pressure: Up to 3,705 psig
• Setpoint: 50–1,000 psig
• Sizes: 1″–2″
• Cv: Up to 6.0
• Body: SST / Carbon Steel
• Temp Range: –20 °F to +350 °F

Model 31-B / 3171 – Compact Spring-Loaded

• 31-B: Inlet ≤150 psig; Setpoint: 2–50 psig; Cv: ~0.05
• 3171: Inlet ≤1,500 psig; Setpoint: 50–500 psig; Cv: ~0.1

Model 6987 – Precision Pilot-Operated

• Inlet Pressure: Up to 1,500 psig
• Setpoint: 5–400 psig
• Sizes: ½″–1″
• Cv: 0.1–0.3
• Body: SST
• Seat: PTFE

Model 8311 HP / LP – Extended Pressure Control

• HP: Inlet ≤3,000 psig; Setpoint: 10–750 psig
• LP: Inlet ≤450 psig; Setpoint: 1–30 psig
• Size: ½″
• Cv: Up to 0.5

Model B2 / B7 – Compact Pilot-Operated

• Inlet: 100–1,000 psig
• Setpoint: 5–200 psig
• Sizes: ½″–1″
• Cv: 0.1–1.0

Model BA1 – Air-Operated Diaphragm

• Inlet: Up to 150 psig
• Control Signal: 3–15 psig
• Size: ½″
• Body: SST

Model BGR-1 / BGR-2 – Gas Return

• Inlet: 150–1,000 psig
• Sizes: ½″–2″
• Cv: Varies
• Body: SST
• Seat: PTFE

Model BL1 / BQ – Bleed / Line Protection

• Inlet: 150–600 psig
• Setpoint: 10–200 psig
• Size: ½″
• Cv: ~0.01

Model BR – Bypass Regulator

• Inlet: Up to 1,500 psig
• Setpoint: 50–500 psig
• Sizes: 1″–2″
• Cv: Up to 4.0

Model C-BPV / CA Series – Sanitary Tri-Clamp

• Inlet: Up to 150 psig
• Setpoint: 5–100 psig
• Sizes: ½″–2″
• Cv: 0.3–2.7
• Body: 316L SST

Model DA5 / DA8 – Dome-Loaded, High-Capacity

• Inlet: Up to 740 psig
• Setpoint: 10–300 psig
• Sizes: 1″–2″
• Cv: Up to 2.0

Model SA5 – Sanitary Spring-Loaded

• Inlet: Up to 150 psig
• Setpoint: 5–100 psig
• Size: 1″
• Cv: ~1.0
• Body: 316L SST

Applications

• Tank blanketing and vapor return control
• Steam and air pressure control systems
• Pump bypass and recirculation duties
• Sanitary and hygienic process lines
• Fuel gas and inert gas distribution
• Instrumentation and pilot loop protection
• Pressure balancing in closed-loop systems

Notable Features

• ANSI and 3A-compliant construction
• Adjustable or fixed setpoints
• Compact footprint for skids and panels
• Optional soft or metal seats for sealing
• Available in multiple actuator types
• Low maintenance, long-life performance

Why Choose Cashco Back Pressure Regulators

• Comprehensive range of models for every pressure class
• Adaptable for corrosive, clean, or hazardous environments
• Reliable performance under fluctuating loads
• Global availability and documentation support
• Trusted by OEMs and industrial end-users worldwide