Valves & Actuation
![Plast-O-Matic BSDA Series: Air-Operated Diaphragm Valve Fail Close Normally Closed - PVC \ PTFE](/sites/default/files/styles/list/public/images/product/10c5c9fc4a494a54c3bb7db9fa01/POM%20BSDA.jpg?itok=9cTbM-6q)
Air-Operated Diaphragm
Series BSDA miniature air-operated diaphragm valves are designed for pressure applications with highly-corrosive or ultra-pure liquid systems when space is critical. The valve is ideal for a broad range of industrial applications, from electronics to chemical plants, commercial laundries, car wash operations etc. The standard valves are air pressure-to-open with spring return-to-close. Liquid line pressure assists in opening the valve. Not designed for vacuum service.                                                                                                         Â
Normally-Closed Operation
A 3-way air solenoid valve connection to the 1/8" NPT port is required to actuate the diaphragm valve. When air pressure (40 to 100 psi) is applied, the diaphragm valve opens and, when removed, spring force closes the valve.
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Materials of Construction
With the series BSDA air-operated diaphragm valves, the standard diaphragm material is a combination of PTFE on the wetted side backed up with Viton® for strength and flexibility. Body materials available are PVC, CPVC, Polypropylene, PVDF and Teflon®.
The upper air section is always PVC.
![last-O-Matic CKM Series: Automatic](/sites/default/files/styles/list/public/images/product/65b80b9c34b53a2f0619df63c5c5/ckm%20check.jpg?itok=QtwZ92yA)
![Plast-O-Matic CKM Series: Automatic - CPVC \ EPDM](/sites/default/files/styles/list/public/images/product/65b80b9c34b53a2f0619df63c5c5/POM%20DCV.jpg?itok=zvn4FerL)