Air Pressure Regulators

Direct-acting, high-performance Marsh Bellofram air pressure regulators offer precision control, high-accuracy, maximum stability, large flow and exhaust capabilities to support even the most challenging OEM and industrial applications.

Type 10 Air Pressure Regulator

The Marsh Bellofram Type 10 is a high-precision air regulator, designed to control output pressure with an accuracy of 0.1%, with very low sensitivity to changes in supply pressure, ambient temperature and flow.

Type 110

The Type 110 air pressure regulator combines the proven technology of the Marsh Bellofram Type 10 regulator with the large pneumatic booster of the Type 79 Relay. The result is a precise, crisply responding regulator that can achieve very large forward and exhaust flows. The Type 110 was developed specifically for use with Air Balancing Systems or Zero-Gravity Arms.

Type 40 Air Pressure Regulator

The Marsh Bellofram Type 40 Adjustable General Purpose Air Pressure Regulator is a reliable precision air pressure regulator, designed for instrumentation and general purpose use. Test data for the Type 40 shows excellent performance characteristics as compared to other units on the market. Units are field-proven as superior in such areas as regulated pressure vs. flow, forward-to-reverse flow offset, supply pressure sensitivity, repeatability and stability, among others.

Type 41 Precision Air Pressure Regulator

The Marsh Bellofram Type 41 precision air pressure regulator incorporates a patented Bellofram rolling diaphragm design and is ideal for applications which require high flow capacity, low droop, high accuracy and fine adjustment sensitivity. Type 41 regulators offer reduced size and several mounting options, allowing them to be used as compact drop-in replacements for other manufacturers� models.

Type 50 & 50 NACE Filter Air Set Regulators

The Marsh Bellofram Type 50 & Type 50 NACE are reliable, precision filter air set pressure regulators, designed for instrumentation and general purpose use in both standard (Type 50) and corrosive environments (Type 50 NACE). The Type 50 NACE complies with NACE material requirement #MR-01-75 for sulfide stress cracking-resistant metallic materials for oil field equipment.

Type 51

The Bellofram Type 51 Precision Air Regulator series offers a high-performance regulator in a compact, low cost package. It operates in output pressure ranges up to 100 psig / 6.9 BAR (120 psig / 8.3 BAR in T-51FR Corrosive Tec & T51FRWT), with a maximum supply pressure of 250 psi (17.3 BAR). .

Type 51SS

The Type 51SS regulator product line is designed for service with a wide variety of corrosive gases and environments. Special construction features include 316 stainless steel for the housing and filter assemblies, with fluorocarbon elastomers used for the control diaphragm and the supply valve. The regulators and filter assemblies comply with NACE material requirement #MR-01-75 for sulfide stress cracking resistant metallic material for oil field equipment.

Type 60 & Type 65

Marsh Bellofram�s General Purpose Type 60 & Type 65 Precision Air Regulators are reliable precision units designed for instrumentation and general purpose use. The Type 60 is a pre-set, fixed-pressure unit with a dripwell. The Type 65 is similar to the Type 60, but without a dripwell. These regulators are generally superior in regulated pressure vs. flow, forward-to-reverse flow offset, supply pressure sensitivity, repeatability and stability.

Type 70 High-Flow Air Pressure Regulator

The Marsh Bellofram Type 70 air pressure regulator is expressly designed for applications requiring substantial flow capacity of up to 80 SCFM (2250 LPM) and accurate pressure controls. Downstream pressure can be set within 0.25 in. (6.3mm) of water column and is accurately maintained under varying conditions via an aspirator tube which adjusts air supply in accordance with flow velocity.

Type 70 BP

The Marsh Bellofram Type 70BP back pressure air regulator is a high-flow, high-precision pneumatic relief valve with adjustable set point. It is expressly designed for applications requiring high flow capacity of up to 50 SCFM (1400 LPM) and accurate pressure controls. It may be used in place of a standard relief valve to improve pressure control while maintaining protection against over-pressurization of supply pressure lines to instruments and other control devices.

Type 77

Bellofram�s Type 77 Vacuum Regulator incorporates a fixed negative 15 psig bias spring to maintain vacuum outputs up to 29" Hg. An adjustable opposing range spring increases controlled pressure outputs up to 150 psig. A balanced supply valve, utilizing a reinforced rolling diaphragm, keeps regulator output virtually immune to changes in supply pressure.

Type 78 Direct Acting Air Pressure Regulator

The Marsh Bellofram Type 78 is a direct-acting, high-performance air pressure regulator, designed to offer high-accuracy, large flow and exhaust capabilities within OEM and industrial applications. Available in five different pressure output ranges to 125 psig (8.6 BAR), this precision regulator offers low droop, high accuracy and fine adjustment sensitivity with maximum supply pressure rated at 400 psig (27.6 BAR) and achievable flow rates of well over 200 SCFM.

Miniature Regulators

With the new Type 92, Marsh Bellofram has created a subminiature regulator with a true rolling diaphragm design. Designed for applications with limited space and for low flow or dead end service.

The Type M1R Miniature Air Regulator is a compact, low cost regulator, which operates in output pressure ranges up to 120 psi, with a maximum supply pressure of 145 psig.

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High Pressure Gas Regulators

Marsh Bellofram BelGAS pressure regulators and control valves offer durable construction
and reliable performance in even the most demanding of environments.

P627

The Type P627 is a high-performance, spring loaded, direct operating high-flow gas regulator, designed to control both low- and high-output pressures within oil and gas applications. Regulators are offered with a powder-coated epoxy exterior finish, as well as with multi-position body and spring case configurations, with optional external pressure registration (P627M) and NACE construction.

R627

The Type R627 relief regulator features an internal valve that provides reliable protection against over pressurization, and in many cases, eliminates the need for an external relief valve. As output pressure builds above the start-to-discharge point, the relief seat disengages from the diaphragm and excess pressure is relieved through the bonnet vent port. As a result, output pressure reduces and returns to initial set point.

P630

The Type P630 is a spring loaded, direct-operated regulator for high pressure and high flow applications. A heavy duty construction incorporating stainless steel internal components and a powder-coated epoxy exterior finish makes it ideally suited for use within demanding oil and gas environments. All Marsh Bellofram BelGAS Type P630 steel regulators meet NACE MR0175 material requirements for corrosive (sour gas) environments.

P39

The Type P39 is the industry�s largest and most easily configurable gas pressure regulator. Units are offered with a choice of three different seat materials, allowing the designer to custom fit for individual applications. In addition, our broad selection of six different outlet pressure spring ranges allows for more precise regulation of downstream pressure for better process control. Piping designs can be simplified by using any one (or all) of the regulator�s three standard outlet ports.

P912

The compact Type P912 pressure regulator functions as a general purpose pneumatic pressure controlling device with an adjustable set point. Because of its versatility, the Type P912 can be used across a wide variety of applications where accurate pressure regulation is required. The internal relief feature allows the regulator to respond quickly to relieve excess pressure upon demand.

P143

The Type P143 pressure regulator is ideal for natural gas, air, propane and general purpose gas pressure regulation. Uses include commercial, residential and light industrial for burners and unit heaters. The P143 has an internal relief device and is available in the low pressure cut off � LPCO � version.

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