Valves & Actuation

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.                                                                                                          

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.
 

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.

Advantages of Plast-O-Matic Gauge Guards
• Inexpensive initial investment   • Reduces instrument failures   • Reduces system down time   • Eliminates special alloy instruments   • Maximum chemical / temperature compatibility

* “T” in model number refers to PTFE diaphragm, FKM available, change “T” to “V”, prices are the same.

Plast-O-Matic Chemical Gauge Guards should be utilized to isolate and protect pressure or vacuum instruments used on ultra-pure or highly corrosive fluid lines. Utilization of Plast-O-Matic gauge guards offers the added advantage of protection against clogging of instruments caused by suspended solids or highly viscous fluids. Gauge Guards are available with or without gauges.

Advantages of Plast-O-Matic Gauge Guards
• Inexpensive initial investment   • Reduces instrument failures   • Reduces system down time   • Eliminates special alloy instruments   • Maximum chemical / temperature compatibility 

GGS-Series Gauge Guard with 2-1/2" Stainless Steel Gauges (1/4" gauge connection, 1/2" FNPT process connection)

Plast-O-Matic Chemical Gauge Guards should be utilized to isolate and protect pressure or vacuum instruments used on ultra-pure or highly corrosive fluid lines. Utilization of Plast-O-Matic gauge guards offers the added advantage of protection against clogging of instruments caused by suspended solids or highly viscous fluids. Gauge Guards are available with or without gauges.

Advantages of Plast-O-Matic Gauge Guards
• Inexpensive initial investment   • Reduces instrument failures   • Reduces system down time   • Eliminates special alloy instruments   • Maximum chemical / temperature compatibility 

GGS-Series Gauge Guard with 2-1/2" Stainless Steel Gauges (1/4" gauge connection, 1/2" FNPT process connection)

Series RVDT In-Line Pressure Relief Valves feature a wetted flat PTFE diaphragm to resist both chemical attack and salt crystallization problems. A large, active diaphragm area provides for smooth, chatter-free operation. Relief setting is infinitely adjustable from 5 PSI to 100 PSI. This design functions as a relief valve, by-pass valve, back-pressure valve and anti-siphon valve. The Relief Function protects systems and equipment from over-pressure and pressure surges. The By-Pass Function prevents pumps from “dead-heading”. The Back- Pressure Function maintains necessary reverse pressure in closed-loop systems. The Anti- Siphon Function prevents unwanted chemical siphoning, if city water pressure drops to zero, and changes in elevation create negative pressure. Series RVDT relief valves are constructed of Type 1, Grade 1 PVC, CPVC, Polypropylene, PTFE or PVDF Kynar® body materials. The wetted diaphragm is PTFE, energized by a non-wetted Viton® diaphragm. Springs (not in wetted area) are zinc-plated steel, fasteners are stainless steel and the adjusting screw is polyethylene.