DELIVERY SYSTEM ACCESSORIES
Models SG6540, SG6541
General Service & Explosion Proof Pressure Switches
monitor line pressure and can activate an external alarm (not supplied) when a certain predetermined pressure is reached. They can be set to activate on
either increasing or decreasing pressure.
Pressure switches are commonly used with cylinder manifolds to warn against product depletion. For example, a switch set to activate on decreasing pressure
can alert the user that manifold pressure is low and that a cylinder changeout is required.
Two models of pressure switches are available; a general service version for nonflammable gases, and an explosion-proof version for flammable gases
or Oxygen. The explosion-proof model is UL listed and CSA certified for use in hazardous locations Class I Groups A, B, C, D and Class II Groups E, F,
G. Each model has a single-pole, double throw, electrical switch with a maximum rating of 15 amps at 250 VAC. Their weather tight housings are constructed
Pressure switches are supplied with two compression-type male connectors and five feet of stainless steel tubing for connection to a manifold or pipeline.
Table I, General Service and Explosion-Proof Pressure Switches
Maximum Inlet Pressure
Operating Temp. Range: -30°F to 200°F
(+32°F to 400°F with Viton®
Adjustable Pressure Range
15 amps at 250 VAC
5 amps at 30 VDC (resistive)
Minimum Current Required: 100mA
Housing: NEMA 4, 4X, IP65
Pressure Port Connection: 1/4" NPT female
Male Connectors (2 supplied):
1/4" NPT male by 1/8" compression and
1/8" NPT male by 1/8" compression
Tubing: 5' x 1/8" OD
SG6540: 2 lbs
SG6541: 3 lbs
Materials of Construction
Diaphragm: Type 316 Stainless Steel
Pressure Port: Type 316 Stainless Steel
Male Connectors: Type 316 Stainless Steel
Tubing: Type 316 Stainless Steel
Application Note Oxygen Service: We strongly recommend the use of our Explosion-Proof Type Pressure Switch for Oxygen Applications.
The Explosion-Proof models contain a hermetically sealed switching element, which provides a safe environment for handling Pure Oxygen.