The Murphy PT167EX is a pressure Swichgage instrument connected to a threaded pressure diaphragm housing. The Swichgage instrument is enclosed in an explosion-proof case and is CSA rated for Class I, Division 1, Groups C and D.
A Swichgage instrument is a pressure-indicating gage with adjustable low and high pressure limit switches. When the gage pointer touches the low or high limit switches, an electrical circuit is completed which can operate alarms and/or shut down equipment.
The 2 NPT, sealed diaphragm housing is attached directly to the Swichgage connection. The diaphragm housing is filled with a silicone fluid so that pressure against the diaphragm causes the Swichgage instrument to respond. The housing seals the Swichgage sensing element from the medium being measured.
Applications include highly viscous liquids such as crude oil on lead line applications. Other applications have included asphalt, sludge, abrasive materials, etc.
Case: Explosion-proof, sand cast aluminum. Lens is removable. CSA Listed for Class I, Division 1, Groups C and D.
Contact Rating: 1 A, 125 VAC
Dial: 4-1/2 in. (114 mm) white on black, dual scaled psi/kPa. Other dial configurations available. Consult factory.
Ranges: See How to Order
Gage Accuracy: ±3% full scale
Process Connection: 2 NPT
Maximum Pressure: 30% overpressure
Diaphragm Housing: Plated steel, Ni-Span®; silicon filled
Diaphragm Fluid: Silicone 200
Shipping Weight: 16.5 lb (7.5 kg)
Shipping Dimensions: 12 x 12 x 9 in. (305 x 305 x 229 mm)