Description
Overview
The Type 7200BP Precision Back Pressure Regulator is a high-flow, highly accurate, and repeatable pneumatic relief valve with an adjustable setpoint. It is normally closed and remains closed until inlet pressure exceeds the selected setpoint. These units can also be used to control flow.
When system pressure rises above the setpoint, the valve opens and vents air until the pressure falls below the setpoint. This operating principle makes the Type 7200BP well suited for protecting downstream pneumatic systems against excessive pressure buildup.
A large relief valve provides flow capacity up to 350 scfm, while an isolated control chamber helps prevent hunting and vibration during changing flow conditions. Relieved air can be discharged to atmosphere or captured and directed to activate an emergency shut-off valve or other safety device.
Key Features
- High-flow precision back pressure regulation
- Adjustable pressure setpoint
- Normally closed operation
- Protects pneumatic systems against overpressurization
- Large relief valve with flow capacity up to 350 scfm
- Sensitivity better than 1/2″ water column
- Highly accurate and repeatable pressure control
- Isolated control chamber helps prevent hunting and vibration
- Stable performance during changing flow conditions
- Available in 1/4″, 1/2″, and 3/4″ NPT port sizes
- Two 1/4″ NPT gauge ports
- Maximum system pressure of 250 psig (17.5 bar)
- Wide operating temperature range
- Pipe, panel, or bracket mounting
- ATEX option available
Performance Characteristics
- Maximum Relief Flow: Up to 350 scfm, depending on port size, setpoint, and pressure rise
- Maximum Flow Coefficient (Cv): 4.6 for 1/4″ NPT, 6.2 for 1/2″ NPT, and 7.5 for 3/4″ NPT
- Exhaust Capacity: Depends on port size; refer to the flow curves
- Sensitivity: Less than 1/2″ water column
- Maximum System Pressure: 250 psig (17.5 bar)
- Pressure Ranges: 0-2 psig, 0-10 psig, 0-30 psig, 0-60 psig, 0-100 psig, and 0-150 psig
- Operating Temperature: -40°F to 200°F (-40°C to 93°C)
- Inlet and Outlet Port Sizes: 1/4″, 1/2″, or 3/4″ NPT
- Gauge Ports: Two 1/4″ NPT ports
- Mounting: Pipe, panel, or bracket
- Weight: 2.5 lbs (1.13 kg)
- Housing Material: Die-cast aluminum alloy
- Bolting Material: Zinc-plated steel
- Internal Components: Stainless steel, plated steel, brass, and aluminum
- Elastomers: Nitrile
- Knob Material: Phenolic plastic
Relief capacity varies with port size, pressure range, setpoint, and allowable pressure rise above the setpoint. For example, a 1/4″ NPT Type 7200BP set to begin relieving at 30 psig can flow approximately 100 scfm if system pressure rises to 50 psig.
How to Select the Right Configuration
Selecting the correct Type 7200BP configuration depends on the desired setpoint range, required relief flow, connection size, allowable pressure rise, mounting method, and environmental requirements.
- Select the pressure range that places the normal operating setpoint comfortably within the available adjustment span.
- Choose the 0-2 psig range for very low-pressure pneumatic protection.
- Choose the 0-10 psig or 0-30 psig range for low- and medium-pressure systems.
- Choose the 0-60 psig, 0-100 psig, or 0-150 psig range for higher-pressure applications.
- Select 1/4″ porting for lower-flow or compact installations.
- Select 1/2″ or 3/4″ porting when maximum relief capacity is required.
- Review the flow characteristic curves to verify capacity at the selected setpoint and allowable pressure rise.
- Select the stainless steel knob stem for increased corrosion resistance while retaining hand adjustment.
- Select the square-head adjustment screw for installations where hand adjustment is not required.
- Choose the tamper-proof cover when casual setpoint adjustment must be prevented.
- Select the ATEX option when hazardous-area compliance is required.
- Add the mounting bracket for side mounting.
- Add the appropriately sized exhaust screen or muffler fitting when reducing debris entry or exhaust noise is important.
For additional guidance:
Applications
The Type 7200BP is designed for pneumatic systems requiring high relief capacity, sensitive response, and repeatable upstream pressure control.
- High-flow pneumatic overpressure protection
- Compressor and receiver systems
- Emergency shut-off valve triggering
- Instrument air supply protection
- Tank blanketing systems
- Process control systems
- Pneumatic bypass circuits
- Industrial test stands
- OEM compressor packages
- Fuel cell testing equipment
- Extrusion and web-tensioning systems
- Flow Control
In a typical overpressure application, the regulator remains closed during normal operation. When inlet pressure exceeds the selected setpoint, the Type 7200BP opens and vents excess pressure to atmosphere or routes it to another safety device.
Models & Configurations
Type 7200BP Ordering Structure
7200 – [Port Size] [Range] [Options]
Port Sizes
- B = 1/4″ NPT
- D = 1/2″ NPT
- E = 3/4″ NPT
Pressure Ranges
- A = 0-2 psig (0-0.15 bar)
- B = 0-10 psig (0-0.69 bar)
- C = 0-30 psig (0-2.0 bar)
- D = 0-60 psig (0-4.0 bar)
- E = 0-100 psig (0-6.89 bar)
- F = 0-150 psig (0-10 bar)
Available Options
- K = Stainless Steel Knob Stem with Phenolic Plastic Knob
- S = Square-Head Adjustment Screw
- T = Tamper-Proof Cover
- X = ATEX 2014/34/EU
Accessories
- Mounting Bracket, zinc-plated steel: P/N 449-542-045
- 0-15 psi Gauge, 1/4″ NPT back mount: P/N 446-725-003
- 0-30 psi Gauge, 1/4″ NPT back mount: P/N 446-725-004
- 0-60 psi Gauge, 1/4″ NPT back mount: P/N 446-725-001
- 0-160 psi Gauge, 1/4″ NPT back mount: P/N 446-725-002
- 1/4″ NPT Exhaust Screen/Muffler Fitting: P/N 445-761-008
- 1/2″ NPT Exhaust Screen/Muffler Fitting: P/N 445-761-013
- 3/4″ NPT Exhaust Screen/Muffler Fitting: P/N 445-761-006
Technical Resources
- Product Data Sheet
- Installation Instructions
- Product Configurator
- 3D CAD Models
- Engineering Support Resources
FAQs
What is the Type 7200BP precision back pressure regulator used for?
The Type 7200BP is used to protect pneumatic systems from excessive pressure buildup by relieving air when inlet pressure rises above its adjustable setpoint.
How much relief flow can the Type 7200BP provide?
The Type 7200BP can provide relief flow up to 350 scfm, depending on port size, setpoint pressure, and the pressure rise above the setpoint.
What pressure ranges are available?
The Type 7200BP is available in 0-2 psig, 0-10 psig, 0-30 psig, 0-60 psig, 0-100 psig, and 0-150 psig ranges.
What is the maximum system pressure?
The maximum system pressure is 250 psig (17.5 bar).
What port sizes are available?
The Type 7200BP is available with 1/4″, 1/2″, and 3/4″ NPT inlet and outlet ports.
How sensitive is the Type 7200BP?
The Type 7200BP reacts to pressure deviations of less than 1/2″ water column.
Why does the Type 7200BP use an isolated control chamber?
The isolated control chamber helps prevent hunting and vibration during flow conditions, supporting stable and repeatable pressure control.
Can relieved air be captured instead of vented to atmosphere?
Yes. Relieved air may be captured and routed to another device, such as an emergency shut-off valve, when the system is designed for that purpose.
