February 23, 2009 - K-TEK announced the BETA Air Relay, a pilot-operated, snap action pneumatic switch. The switch features a narrow deadband, as low as 10 mbar, and supports pilot supply and signal pressures up to 7.0 bar. Designed for valve control, bleed-off shut-down, or alarm applications - both offshore and on - the BETA Air Relay can also be safely used in hazardous areas, including Zone 0 (no spark) applications.
The switch is available in two configurations: TYPE SA for Normally Closed (N.C.) operation and TYPE SB for Normally Open (N.O.) operation.
Unique Switch Design
A high quality, self-aligning diaphragm/piston sensor is at the heart of the BETA Air Relay switch. Limited piston travel translates pressure at the diaphragm directly to actuation of the microswitch. This means no intervening linkages or mechanisms, and full protection against high overrange pressures up to 400 bar. The BETA Air Relay's piston sensor is isolated from the process fluid by a diaphragm and static O-ring seal, retained by a process connection port. These process wetted parts are available in a wide range of materials, eliminating the need for costly chemical seals.
Process connections are available in 316 stainless steel, Monel, and aluminum. Diaphragm and O-ring material choices include Buna-N, EPR, Kalrez, neoprene, Teflon, 316 stainless steel, tantalum, Viton A, and Monel. A venting port avoids overpressure in the enclosure. The BETA Air Relay has been certified by KEMA for use in potentially explosive atmospheres.
Price & Availability
The BETA Air Relay is available for shipment. Prices start at $365.
