Dwyer-Dual-Action Explosion-Proof Pressure Switches-A1ni

( Dwyer )

Feature:
Explosion-Proof, UL & CSA Listed for Class I, Groups B, C & D and Class II, Groups E, F & G. The H2 is designed for sequencing two different actions as pressure of a liquid or gas increases or decreases. The patented design consists of two concentric pistons operated by a single diaphragm with one pressure chamber. Each piston actuates a separate switch independent of the other. The switches may be adjusted to operate together, at opposite ends of the range or at two intermediate set points. The threaded top is removed to field adjust or service switches without disturbing electrical or pressure connections. The Duotect ® switch is explosion-proof and weatherproof. It can be mounted in any position and is not affected by vibration.
Specifications:
Wetted Materials	Aluminum chamber with Polyester Film diaphragm and Buna-N O-ring standard. Brass chamber or 316 SS chamber optional. FEP diaphragm optional. Fluoroelastomer or EPDM O-ring optional.
Temperature Limit	275°F (135°C). CSA approved: -20 to 90°C (-4 to 184°F).
Pressure Limit	1500 psig (103 bar).
Switch Type	Two SPDT snap switches.
Electrical Rating	5A @ 125/250 VAC. 5A res., 3A ind. @ 30 VDC. Gold contacts or 10A switch optional.
Electrical Connections	18 AWG, 18˝ (460 mm) long.
Conduit Connection	3/4˝ female NPT.
Process Connection	1/4˝ female NPT.
Mounting Orientation	Any Position.
Set Point Adjustment	Internal nut.
Weight	2 lb (.9 kg).