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Marsh Bellofram is a manufacturer of Air Regulators, Transducers,Process Gauges,Pressure Regulators.
 

Precision

Precision pressure regulator
Model : Type 10
a servo balanced system, the main valve is operated by a pilot valve -and is also available in a motorized configuration.
Precision regulator
Model : Type 41
regulators are designed for applications requiring high flow capacity, low droop, high accuracy, and fine adjustment sensitivity.
Precision regulator
Model : Type 70
Type 70 Regulator is specifically designed for applications that require substantial flow capacity and accurate pressure controls.
Precision Vacuum Regulator
Model :Type 77
Vacuum Regulator incorporates a fixed negative 15 psig bias spring to maintain vacuum outputs up to 29" Hg. The Type 77 provides precise control in subatmospheric pressure applications.
High Flow Precision Air Regulator
Model : Type 78
High Flow Precision Air Regulator is designed for applications where precise control of flow is needed. This regulator offers low droop, high accuracy, and fine adjustment sensitivity.

Type 10

Type 41 Type 70

Type 10

Type 41 Type 70

Type 77

Type 78

Type 77

Type 78

Precision - Type 10


There is no other self-contained pressure regulator in the entire world, which can match the regulation accuracy and the repeatability of the Bellofram Type 10 pressure regulator. It is for use where the utmost precision is required. The regulator is actually a pressure controller using a servo-balanced system in which the main valve is operated by a pilot valve and is dependant on a stainless steel measuring capsule for its incredible accuracy. Originally developed for sensitive aircraft altimeters, this precision sensing element provides the energy to activate the servo-control mechanism. It provides greater regulation accuracy and eliminates the problems usually encountered with range springs and conventional diaphragms. The entire measuring element, including the pilot valve, is fabricated from stainless steel which has been carefully heat treated to eliminate hysterics or permanent deformation under all working conditions.
 

Precision - Type 10

The Bellofram Type 10 regulators output pressure with an accuracy of 0.1%, and has very low sensitivity to changes in supply pressure and flow. Designed to eliminate the need for any readjustment of the regulated pressure after long "down time." At start-up, the regulated pressure will return to its output setting. The regulated pressure is held constant over substantial changes in flow due to the high-gain pneumatic servo amplifier and is particularly good from dead end to 12 SCFM. An integral relief valve provides for exhaust flow whenever the regulated pressure is reset to a lower value. The exceptionally large capacity of this relief valve assures immediate response when the downstream regulated pressure must be reduced under dead-end conditions. Pressure stability is achieved by a high performance servo-operated control mechanism utilized in the regulator and the pressure supplied to the pneumatic servo amplifier is reduced and held constant.
Precision - Type 10 Motorized
Applications for the Type 10 Pressure Regulator include; Gas Mixing, Valve Operators, Gate Actuators, Positioner Signal, Air Hoists, Calibration Stands, Disc and Shoe Air Brakes, Force Balance Hoists, Air Gauging, Clamp Units, Web Tensioning, Press Units, Roll Loading, and Cylinder Loading
Motorized Type 10
The Bellofram Type 10 is also offered coupled with a bi-directional motor for electronic pressure control. This combination is particularly attractive because it offers low power requirements (2 rpm/4 watts; 6 rpm/6 watts) with extremely high accuracy.
Applications
The motorized Type 10 pressure regulator can be used for any application where electric control of a pneumatic system is desired. It is often used for remote pressure control and for ventilation systems. It can also be easily integrated into open or closed loop process control systems and may be used with programmable controllers.
Price List
Part Number
(Click to Place Order)
Port Size
Range ( psi )
Range (Kpa)
Price
Precision Regulator
1/8"
2-25
15-175
$117.07
1/4"
2-25
15-175
$117.07
3/8"
2-25
15-175
$117.07
1/8"
2-60
15-400
$117.07
1/4"
2-60
15-400
$117.07
3/8"
2-60
15-400
$117.07
1/8"
2-120
15-800
$117.07
1/4"
2-120
15-800
$117.07
3/8"
2-120
15-800
$117.07

BM Bottom Ported
n/a
2-25
15-175
$138.23
n/a
2-60
15-400
$138.23
n/a
2-120
15-800
$138.23

HR Precision Regulator High Relief Capacity
1/8"
2-120
15-800
$142.06
1/4"
2-120
15-800
$142.06
3/8"
2-120
15-800
$142.06

EXHR Precision Regulator Extra High Relief Capacity
1/8"
2-120
15-800
$142.06
1/4"
2-120
15-800
$142.06
3/8"
2-120
15-800
$142.06

PL Precision Precision Plunger Operated
1/8"
2-25
15-175
$172.32
1/4"
2-25
15-175
$172.32
3/8"
2-25
15-175
$172.32
1/8"
2-60
15-400
$172.32
1/4"
2-60
15-400
$172.32
3/8"
2-60
15-400
$172.32
1/8"
2-120
15-800
$172.32
1/4"
2-120
15-800
$172.32
3/8"
2-120
15-800
$172.32

LR Precision Regulator:Low Range Control
1/4"
0.5-25
15-175
$143.38

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Precision - Type 41

The Bellofram Type 41 regulators are designed for applications requiring high flow capacity, low droop, high accuracy, and fine adjustment sensitivity. The use of Bellofram's pre-convoluted rolling diaphragm provides greater sensitivity and improved accuracy from a constant effective area. In addition, Type 41 regulators offer reduced over-all size and new mounting options, providing direct interchangeability with more expensive units available in the industry.
Precision - Type 41
Ruggedly designed and constructed, the Bellofram Type 41 regulators have housings of precision-cast aluminum. They are pressure tested, and are chromate treated for corrosion resistance. Every regulator is finished with vinyl paint which resists scratching, weathering and other physical abuse.
Careful design and quality materials throughout assure long, trouble-free operation in the most difficult industrial environments. A rubberized, soft-seat valve stem provides stability and "forgives" dirt and other foreign matter. An aspirator maintains downstream pressure and compensates for droop when high flow occurs. The gauge port is convenient for gauge installation and can also be used as an additional full flow outlet. The design of these regulators is especially well suited to panel applications due to ease of mounting, small size, adjustment sensitivity, and standard knob. The Type 41 comes in two versions, Type 41-1 and Type 41-2. These two regulators offer the same performance in two slightly different mounting packages.
Price List
Part Number
(Click to Place Order)
Port Size
Range ( psi )
Range (Kpa)
Price
Adjustable Regulator with square head adjusting screw
1/4"
0-10
0-70
$50.20
1/4"
0-30
0-200
$50.20
1/4"
0-60
0-400
$50.20

Adjustabel Regulator with square head adjusting screwd
1/4"
0-120
0-800
$50.20

Adjustable Precision without bonnet vent port
1/4"
0-2
0-15
$71.71

Adjustable Precision without bonnet vent
1/4"
0-10
0-70
$71.71

Adjustable Precision Regulator without bonnet vent port
1/4"
0-30
0-200
$71.71
1/4"
0-60
0-400
$71.71
1/4"
0-100
0-700
$71.71
1/4"
0-2
0-15
$72.90

Adjustable Precision Regulator with bonnet vent port
1/4"
0-10
0-70
$72.90
1/4"
0-30
0-200
$72.90
1/4"
0-100
0-700
$72.90

1/4"
0-60
0-400
$72.90

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Precision - Type 70 High-Flow Pressure

The Bellofram Type 70 Regulator is specifically designed for applications that require substantial flow capacity and accurate pressure controls. Flows of 80 SCFM can be attained. Downstream pressure can be set within 0.25" of water column and is accurately maintained under varying flow conditions with the help of an aspirator tube which adjusts the air supply in accordance with the flow velocity. A balanced supply valve, utilizing a rolling diaphragm, makes the regulator virtually immune to changes in supply pressure.
Precision - Type 70 High-Flow Pressure  
Careful design and quality materials throughout assure long, trouble free operation in the most difficult industrial environments. The Bellofram Type 70 has a rugged, precision die-cast aluminum housing, and is pressure-tested and chromate-treated for corrosion resistance. The regulator housing is finished with vinyl paint, which resists scratching, weathering and other physical abuse.
The Bellofram Type 70 is also available in a back-pressure model, the Type 70BP Back-Pressure Regulator functions as a high flow, high precision pneumatic relief valve with an adjustable set point. Back flows of up to 50 SCFM can be attained. A sensitive Bellofram rolling diaphragm is the key component in making this regulator extremely responsive to slight upstream pressure changes. Stack-up construction makes the regulator easily serviceable, without removing it from the air line.
Price List
Part Number
(Click to Place Order)
Port Size
Range ( psi )
Range (Kpa)
Price
High Flow Pressure Regulator
1/4"
0-2
0-15
$85.33
3/8"
0-2
0-15
$85.33
1/2"
0-2
0-15
$97.89
1/4"
0-10
0-70
$80.31
3/8
0-10
0-70
$80.31
1/2"
0-10
0-70
$97.89
3/8"
0-30
0-200
$80.31
1/4"
0-30
0-200
$80.31
1/2"
0-30
0-200
$97.89
3/8"
0-60
7-400
$80.31
1/4"
0-60
7-400
$80.31
1/2"
0-60
7-400
$97.89
3/8"
2-150
15-1000
$80.31
1/4"
2-150
15-1000
$80.31
1/2"
2-150
15-1000
$97.89
1/4"
3-200
20-1400
$135.77
3/8"
3-200
20-1400
$109.17
1/2"
3-200
20-1400
$125.49

High Flow Back Pressure Regulator
1/4"
0-2
0-15
$120.47
3/8"
0-2
0-15
$120.47
1/2"
0-2
0-15
$136.79
1/4"
0-10
0-70
$120.47
3/8"
0-10
0-70
$120.47
1/2"
0-10
0-70
$136.79
1/4"
0-30
0-200
$120.47
3/8"
0-30
0-200
$120.47
1/2"
0-30
0-200
$136.79
4
60
0-400
$120.47
3/8"
0-60
0-400
$120.47
1/2"
0-60
0-400
$136.79
1/4"
0-150
0-1000
$120.47
3/8"
0-150
0-1000
$120.47
1/2"
0-150
0-1000
$136.79

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Precision - Type 77 Vacuum

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. Output pressure droop under varying downstream flow conditions is minimized by use of an aspirator tube which adjusts the air supply valve opening in accordance with flow velocity. A balanced supply valve, utilizing a reinforced rolling diaphragm, keeps regulator output virtually immune to changes in supply pressure. Stack-up construction makes the Type 77 easily serviceable, without removing it from the air line.
Precision - Type 77 Vacuum  
Applications
The Bellofram Type 77 provides precise control in sub atmospheric pressure applications. specific uses include sample collecting systems, air quality monitoring, parts coating operations, and other industrial functions requiring controlled system pressure from 29" Hg vacuum to 150 psig.
Features
Single-unit control of pressures from 29" Hg vacuum to 150 psi.
Flow capacity up to 40 SCFM.
Dampening action of aspirator tube maintains stable output pressure.
Output virtually unaffected by changes in supply pressure.
Can be disassembled and service without removing from line.
Operation
The regulator may be installed either upstream or downstream from the vacuum pump. Upstream installation is preferred when rapid evacuation of a vessel or system is required, because the exhaust capacity of the pump is normally greater than that of the regulator. In all other applications, the regulator can be located between the pump and the vessel. When the adjustment knob is turned to create an output set point, the range spring exerts a downward force on the signal diaphragm, which causes the supply valve to open. Output pressure, combined with the negative bias spring, creates an upward force on the diaphragm assembly. When the set point is reached, the two forces are in balance. If output pressure exceeds the set point, the excess pressure is transmitted through the aspirator tube to the bottom of the control diaphragm. This moves the diaphragm assembly upward, closing the supply valve. Excess output pressure is vented until the set point is again reached.
Price List
Part Number
(Click to Place Order)
Port Size
Range ( psi )
Range (Kpa)
Price
Vaccum Regulator
1/4"
vac to 2
vac to 15
$190.10
3/8"
vac to 2
vac to 15
$190.10
1/4"
vac to 10
vac to 70
$190.10
3/8"
vac to 10
vac to 70
$190.10
1/4"
vac to 30
vac to 200
$190.10
3/8"
vac to 30
vac tp 200
$190.10
1/4"
vac to 100
vac to 700
$199.60
3/8"
vac to 100
vac to 700
$199.60
1/4"
vac to 150
vac to 1000
$199.60
3/8"
vac to 150
vac to 1000
$199.60

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Precision - Type 78 High Flow Precision Air

The Bellofram Type 78 High Flow Precision Air Regulator is designed for applications where precise control of flow is needed. This regulator offers low droop, high accuracy, and fine adjustment sensitivity. The use of a Bellofram rolling diaphragm provides greater sensitivity and improved accuracy. In addition, the Type 78 offers a balanced pintle, which minimizes output pressure changes caused by fluctuations in supply pressure. Careful design and quality materials throughout assure long, trouble-free operation. The rugged die-cast zinc and aluminum housings are pressure tested to assure safe operation, and are designed to withstand harsh and abusive environments. This durability is attributed to a chemical conversion coating of all cast components, and a vinyl paint finish. With a supply pressure of up to 400psig and output ranges up to 125 psig, the Type 78 can achieve flow rates of well over 200 SCFM.
Precision - Type 78 High Flow Precision Air
Price List
Part Number
(Click to Place Order)
Port Size
Range ( psi )
Range (Kpa)
Price
High Flow Regulator
1/2"
0-2
0-15
$186.30
3/8"
0-2
0-15
$186.30
1/2"
0-2
0-15
$186.30
3/4"
0-2
0-15
$186.30
1"
0-2
0-15
$186.30
3/8"
0-10
0-70
$186.30
1/2"
0-10
0-70
$186.30
3/4"
0-10
0-70
$186.30
1"
0-10
0-70
$186.30
3/8"
0-30
0-200
$186.30
1/2"
0-30
0-200
$186.30
3/4"
0-30
0-200
$186.30
1"
0-30
0-200
$186.30
3/8"
0-60
0-400
$186.30
1/2"
0-60
0-400
$186.30
3/4"
0-60
0-400
$186.30
1"
0-60
0-400
$186.30
3/8"
0-125
0-830
$186.30
1/2"
0-125
0-830
$186.30
3/4"
0-125
0-830
$186.30
1"
0-125
0-830
$186.30

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FLW, Inc is a factory authorized distributor for ATC.  These products are stocked for Rapid Delivery by FLW, Inc and we provide application assistance toll free at (800) 576 - 6308.
   

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