Call Us: (973) 256-3000 Plast-O-Matic Valves, Inc.
1384 Pompton Avenue
Cedar Grove, NJ 07009 USA

PVC Air-Operated Diverter Valves

Series F & Series BFS • heavy-duty 3-way, globe style valves for corrosive & ultra-pure liquids • Spring holds valve to normally open port; Air Pressure diverts flow to 3rd port

Series F air operated diverter valve, also known as a sampling valve or 3-way valve

Photo at right is Series F, 3/4" through 2" pipe sizes. Below left is Series BFS, which is the 1/2" version.

Plast-O-Matic Series F and BFS air operated diverter valves are ideal for handling pureliquids, chemicals, acids, and caustics where high flow and visual verification are important.


  • Pressure balanced shaft & low-friction seals combine for ultra-smooth, non-sticking operation.
  • Clear acrylic cylinder for visual verification of valve position.
  • Simple and inexpensive method of diverting or sampling harsh chemicals.
  • 1,000,000 cycle design
  • Low pressure drop with high flow rates; pressure or vacuum service.
  • Bubble-tight sealing.
  • Can be used as a selector valve, switching flow between two different "inlets."


The valve disk or main seal is automatically held closed against the third port via spring (not in liquid) force. Standard shop air or hydraulic power is applied on the opposing side of a piston attached to the shaft, to compress the spring, closing the normally open port and allowing liquid to flow through the normally closed port. Operation requires a 3-way air solenoid valve to control the air or hydraulic pressure used. The amount of air pressure required depends upon the liquid line pressure present in the valve. It is recommended to regulate the air pressure to 60 - 80 PSI. The air should be filtered and lubricated for longer valve life.

A minimum of 45 PSI air pressure is required to divert flow at liquid pipeline pressures up to 25 PSI. As liquid process pressure in the pipeline increases, the minimum air pressure required to switch ports increases as well. The maximum pipeline pressure the valve will function properly at is 125 PSI.

Series BFS diverter valve in 1/2 inch pipe size

In situations where air pressure is not available, water pressure can be used so long as the pressure available is sufficient to actuate the valve. If hydraulic media is not clean, a filter should be used.

Valves should be mounted upright for best results and less strain on piping.

Sizes & Materials

Series F is available in 3/4", 1", 1¼", 1½" and 2" pipe sizes. Series BFS is available in 1/2" pipe size. Valve body is Geon® PVC. Cylinder walls are high-strength acrylic. Shaft is Geon PVC; PTFE is used on BFS model. External fasteners are stainless steel. Elastomeric seals are choice of Viton®, EPDM, or Buna-nitrile. For other materials, please contact the Plast-O-Matic Technical Department at 973-256-3000 or e-mail

Connections, Pressure Ratings

Standard connections are NPT. Optional connections are socket or flanged. Air inlet connection is 1/8" NPT. Maximum air pressure is 100 PSI. Minimum air pressure required to actuate the valve is 45 PSI. Use of an air flow rate valve may be required to prevent water hammer, depending on your application.

Maximum liquid line pressure is 125 PSI. No minimum liquid line pressure is required for successful use of the valve.

Series F & BFS Dimensions:

Please note that dimensions for Series BFS shown here do not use the same letter references as the printed catalog or .pdf file.

dimensional drawing of Series F or BFS diverter valve
Size1/2" (BFS)3/4" (F)1" (F)1¼" (F)1½" (F)2" (F)
A2 1/263.52 3/469.92 3/469.93 3/1681.03 11/169.74 11/16118.9
B4 1/2114.37 1/8181.07 7/8200.08203.29 1/8231.811 7/8301.6
C2 15/1674.73 5/8 92.14 1/4108.04 15/16125.25 1/2139.76 1/2165.1
D1 1/431.81 3/834.91 3/444.41 15/1649.2250.82 1/457.1
E1 7/1636.51 3/834.91 3/444.41 15/1649.2250.82 1/457.1

Point of clarification: Solid lines show approximate outline of Series F; dashed lines indicates approximate outline of Series BFS.

Specifications & Ordering Information:

Pipe SizeCv FactorPressure RatingsModel Numbers
NO/NCMinimum Air to Close
w/0-50 PSI Line Pressure
Minimum Air to Close
w/125 PSI Line Pressure
1/2"3.6/2.550 PSI
3,45 BAR
65 PSI
4,49 BAR
BFS050V-PV (Viton Seals)
BFS050EP-PV (EPDM Seals)
3/4"12.2/7.350 PSI
3,45 BAR
60 PSI
4,14 BAR
F075V-PV (Viton Seals)
F075EP-PV (EPDM Seals)
1"19.2/11.550 PSI
3,45 BAR
60 PSI
4,14 BAR
F100V-PV (Viton Seals)
F100EP-PV (EPDM Seals)
1¼"34.5/20.745 PSI
3,11 BAR
60 PSI
4,14 BAR
F125V-PV (Viton Seals)
F125EP-PV (EPDM Seals)
1½"47.5/28.540 PSI
2,76 BAR
55 PSI
3,80 BAR
F150V-PV (Viton Seals)
F150EP-PV (EPDM Seals)
2"79.0/47.540 PSI
2,76 BAR
55 PSI
3,80 BAR
F200V-PV (Viton Seals)
F200EP-PV (EPDM Seals)
Please Note: The air pressures required for closing, listed above, are not complete for all liquid line combinations. For example, the F150EP-PV requires 50 PSI air to close against 100 PSI liquid line pressure. The table above is not complete simply because it would be too cumbersome for this website. For more precise data, please refer to the catalog, or click here for the .pdf file.

For Buna-nitrile seals, replace "V" or "EP" with "B". Example: F075B-PV
Maximum air pressure rating is 100 PSI/6,90 BAR

Helpful Links:

.PDF file of Catalog ASO This catalog provides complete data and sample specifications for Globe Style Air Shut-off & Diverter Valves Series BAT, BLT, BST-NC, BST-NO, F, BFS.

3-Way Air-Operated Ball Valve alternative to a 3-way globe-patterned valve.

3-Way Electrically Actuated Ball Valve ...ideal for applications where compressed air is not available.

3-Way Manually operated Ball Valve ...for manual diverting or sampling.

Index Page to all Air-Actuated Globe style Valves with a brief description of each. Includes compact valves, diverter valves, valves that use line pressure to open, double-acting valves, and more. This may be the page you used to arrive here.

Plast-O-Matic Valves, Inc. 1384 Pompton Avenue Cedar Grove,
NJ 07009 USA Phone: (973) 256-3000 Fax: (973) 256-4745
California Warehouse 4054 Brewster Way Riverside, CA 92501
USA phone: (951) 686-2852 Fax: (951) 686-6328
Email: Legacy home page: please click here