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Midstream Oil Gas Air Filter Regulator 1/4 NPT Connection 78-40 Type Air Sets

Midstream Oil Gas Air Filter Regulator 1/4 NPT Connection 78-40 Type Air Sets

fisher valve positioner

fisher pneumatic positioner

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Product Details
Pressure Range:
5-100 Psi (35-700 KPa), (0.35-7 Bar)
Inlet Pressure Rating:
210 Psi (1.5 MPa, 15 Bar) Maximum
1/4 NPT
Product Description

Midstream Oil & Gas use Air Filter Regulators 78-40 type Air Sets for Masoneilan



Product Description


The Model 78 Series pressure regulators are compact, lightweight, high-performance pressure reducing instruments. They are used primarily for supplying a stable source of air to process control equipment such as current to pneumatic transducers and control valve positioners.



Clean the lines thoroughly to remove all dirt, scale or other foreign matter before installing the regulator. Install with flow in direction of flow arrows on regulator body. The first should be installed with the drain cock facing down. Regulator should be installed as close as possible to a device utilizing the reduced pressure to minimize pressure drop. Do not use piping or tubing smaller than the regulator connections since this will restrict flow and reduce capacity. It is recommended that pressure gauges be installed on the inlet and outlet sides of the regulator as an aid in adjusting the pressure and in monitoring of working pressures.



Prior to applying supply pressure, loosen knob lock screw and turn pressure set knob counterclockwise. Turn on supply pressure. Output pressure should be zero. Slowly rotate set knob clockwise until desired pressure is reached. Tighten knob locking screw to ensure that pressure remains set at desired value. When changing output from a higher to lower pres¬sure, initially go to lower than desired pressure, then increase to desired pressure. Re-tighten knob lock-screw.

Pressure Range
5-100 psi (35-700 kPa), (0.35-7 bar)
Inlet Pressure Rating
210 psi (1.5 MPa, 15 bar) maximum
Operating Temperature
Standard Temperature
1/4 NPT
Gas& Oil industry
Midstream Oil Gas Air Filter Regulator 1/4 NPT Connection 78-40 Type Air Sets 0


Special features

  • Universal power input; accepts 115/230AC, 24AC, 12/24DC
  • Universal control; on/off or modulating from the same package
  • Loaded with standard features
  • Continuous duty cycle
  • Agency approvals are standard
  • Optional internal battery back-up power drives to “safe” position after loss of input power


  • Continuous duty applications
  • Applications that may evolve over time; can be re-configured
  • Low-power solar applications
  • Furnace burner control
  • Water reclamation
  • Plunger and gas lift at the wellhead
  • Steam injection
  • Separators
  • Power generation


  • Upstream Oil and Gas
  • Food and beverage processing
  • Water/Wastewater
  • HVAC


Detailed Images
Midstream Oil Gas Air Filter Regulator 1/4 NPT Connection 78-40 Type Air Sets 1
Midstream Oil Gas Air Filter Regulator 1/4 NPT Connection 78-40 Type Air Sets 2

Packaging and Delivery

Export wooden boxes for foreign trade, IPPC sterilized wooden boxes and plywood boxes for export customs inspection-free. Size: 60*30*40 (cm)

The products will be shipped after receiving the deposit or full payment within 15 working days


Our Service

1. Swift delivery
For common parts, we can deliver the goods within 3 days

2. Original products
All the products we sell are from origin manufacturer. We will submit all the manufacturer documentation while we finish delivery.

3. Quality Assurance

4. Technical Support
Including inspection, repair, and maintenance, we can give all kinds of technical support.

5. Quickly response
Our staff will keep 24h online and answer your question very quickly. 


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