Marsh Bellofram / Bellofram Precision Controls Pressure Regulators, Relays and I/P Transducers

Selection and quotation of Bellofram pneumatic controls: Type 10, Type 70 and Type 78 regulators, Type 75 and Type 79 relays, Type 1000 and Type 2000 I/P and E/P transducers, servo controllers, stainless regulators and diaphragm cylinders.

Type 10, Type 110 and Type 41 Precision Pressure Regulators

Type 10 with a pneumatic servo amplifier gives 0.1% accuracy, flow up to 14 SCFM, supply up to 150 psig and ranges of 2-25, 2-60 or 2-120 psig. Type 110 adds the Type 79 relay booster, 250 psig supply and 3/8 to 1 inch NPT ports. Type 41-2 with a rolling diaphragm holds pressure as flow changes.

Type 10 accuracy: 0.1%
Type 10 ranges: up to 2-120 psig
Type 110 ports: 3/8 to 1 NPT
Type 110 supply: up to 250 psig

Type 70, Type 78 High Flow and Type 77 Vacuum Regulators

Type 70 delivers up to 80 SCFM at supply pressure up to 250 psig, and an aspirator tube holds outlet pressure. Type 78 passes over 200 SCFM, outputs up to 125 psig and supply up to 400 psig. Type 77 covers 29 in Hg vacuum to 150 psi at 40 SCFM; Type 37 is a compact Type 78 alternative.

Type 70 flow: up to 80 SCFM
Type 78 flow: over 200 SCFM
Type 78 supply: up to 400 psig
Type 77 vacuum: up to 29 in Hg

Type 20, Type 75 and Type 79 Air Relays and Volume Boosters

Relays reproduce or multiply a pneumatic signal and give the actuator more flow. Type 20 is a two-stage pilot 1:1 relay: 2 to 120 psig output, up to 14 SCFM. Type 75 comes in 1:1, 1:2, 1:4 and 1:6 ratios at about 40 SCFM, and 1:1 Type 79 exceeds 125 SCFM with output up to 200 psig.

Type 20 output: 2-120 psig
Type 75 ratio: up to 1:6
Type 79 flow: above 125 SCFM
Type 79 supply: up to 400 psig

Type 1000 and Type 1500 I/P and E/P Transducers

Type 1000 converts a 4-20 mA signal to 3-15 psi, its integral booster gives 12 SCFM at supply up to 100 psi; the E/P version takes 0-5 V for a 0-30 psig output. Extended Range recalibrates up to 3-145 psig at 24 SCFM. The 4-20 mA Type 1500 gives up to 0-30 psig, 6.5 SCFM and 0.75% accuracy.

Type 1000 I/P input: 4-20 mA
Type 1000 I/P output: 3-15 psi
Extended Range: up to 3-145 psig
Type 1500 accuracy: 0.75%

Type 2000 Hazardous Area Transducers and Type 5000 Transmitter

Type 2000 uses closed-loop feedback and a sealed piezoceramic actuator: ±0.1% FS accuracy, ranges up to 120 psig and flow up to 21 SCFM. Explosion-proof and intrinsically safe versions have FM/CSA or ATEX approvals. NEMA 4X Type 5000 gives a 4-20 or 10-50 mA output.

Type 2000 accuracy: ±0.1% FS
Type 2000 range: up to 120 psig
Type 2000 flow: up to 21 SCFM
Type 5000 accuracy: 0.1%

Type 3110, Type 3510 and Type 3700 Servo Pressure Controllers

Servo controllers hold pressure using an internal sensor. Circuit-card Type 3110 takes 4-20 mA or 0-10 VDC commands with a 0-10 VDC monitor signal. Digital Type 3510 runs over RS-485 from vacuum to 600 psig. Type 3215 exceeds 200 SCFM; Type 3700 keeps pressure if power is lost.

Type 3110 command: 4-20 mA or 0-10 VDC
Type 3510 interface: RS-485
Type 3510 range: up to 600 psig
Type 3215 flow: above 200 SCFM

Type 52SSR, Type 66SS Stainless and Type 40H Hydrogen Regulators

Type 52SSR in 316 stainless steel serves sour gas and corrosive media: ranges from 3-30 to 15-150 psig, ±1.0 psig sensitivity and 38 SCFM flow. Type 66SS works up to 250 psig with a 25 micron filter. Type 40H for hydrogen and fuel cells takes inlet up to 250 psig and flows 250 SCFH.

Type 52SSR body: 316 stainless
Type 66SS pressure: up to 250 psig
Type 66SS filter: 25 micron
Type 40H flow: 250 SCFH

Standard, Super and Small Bore Diaphragm Air Cylinders

A flexible diaphragm replaces the sliding piston seal. Standard cylinders: eight sizes, spring-return or double-acting, 2.3 to 6.8 inch equivalent bores, up to 145 psig (10 bar). Super cylinders add linear ball bearings; Small Bore units use 0.38 and 1.7 sq. inch diaphragms.

Standard: eight sizes
Equivalent bore: 2.3-6.8 inches
Pressure: up to 145 psig (10 bar)
Diaphragm: neoprene with Dacron fabric

Choosing a Regulator by Flow and Pressure

For precise pressure at modest flow choose Type 10: 0.1% accuracy, flow up to 14 SCFM and ranges up to 2-120 psig. When more flow is needed, take Type 70 (up to 80 SCFM), Type 110 with the Type 79 relay booster or Type 78 (over 200 SCFM with supply up to 400 psig).

Type 77 handles vacuum and positive pressure in one unit. To drive a large actuator from a weak pneumatic signal, fit a Type 75 or Type 79 relay, which delivers more flow to the actuator.

Current, Voltage or Digital Control

The Type 1000 I/P transducer takes a 4-20 mA current, and the E/P version takes 0-5 V; both have an integral booster for up to 12 SCFM. For hazardous areas Type 1000 and Type 2000 come in explosion-proof and intrinsically safe versions.

When pressure feedback is required, choose a servo controller: the analog circuit-card Type 3110, the digital Type 3510 with RS-485 or the proportional Type 3700 with IP65 protection.

Corrosive Media, Oxygen and Hydrogen

Type 52SSR in 316 stainless steel is made for sour gas and corrosive environments; Type 66SS has a 316L body, bonnet, bowl and internal parts, with oxygen cleaning available. The Type 50 filter/regulator has a 40 micron self-cleaning filter and a NACE version for corrosive service.

For hydrogen and fuel cells there is Type 40H with inlet up to 250 psig and a proof pressure of 3,500 psig.

Repair Kits and Diaphragm Cylinder Parts

Regulator repair kits follow the range: Type 10 kits are made for 2-25, 2-60 and 2-120 psi, and Type 40 and Type 65 kits cover fluorocarbon pintle and non-relieving versions.

Type 1000 kits differ by input: 4-20 mA, 10-50 mA, 0-5 or 1-5 V, 0-10 or 1-9 V. Standard cylinders in sizes 4 and 6 have aluminum shells and larger sizes steel shells, with ground hard-chrome plated rods and sintered bronze bearings; Super cylinders add linear ball bearings.

Marsh Bellofram / Bellofram Precision Controls and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Marsh Bellofram / Bellofram Precision Controls and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.