20PW7-HLK-200 Water Pressure Swichgage® (05707412)

20PW7-HLK-200: 2" Water Pressure Swichgage® w/lockout; 0-75 psi (05707412)

The Murphy 0-200 PSI Water Pressure Swichgage 2" with Lockout, High/Low Contacts and Knob Adjusting Face Contact 20PW7-HLK-200 is a diaphragm-actuated pressure-indicating gage with a built-in electrical limit switch. This swichgage is used for tripping alarms and/or shutdown devices. The gage mechanism is enclosed in a steel case coated to resist corrosion. A polycarbonate, break-resistant lens and a polished, stainless steel bezel help protect this rugged, built-to-last instrument. Accuracy and protection from moderate overpressure is assured by a unique, unitized diaphragm chamber. A built-in pulsation dampener helps eliminate pointer flutter and is removable for cleaning.

This unit includes a front, semi-automatic lockout for startup override. This built-in device holds the pointer away from the contact on startup. When pressure exceeds the set point, the lockout is automatically disengaged. The low limit contact can be by-passed on start-up by pushing the lockout button. It holds the pointer away from the shutdown contact while the engine starts. The lockout will disengage automatically on rising pressure.

The gage pointer acts as a pressure indicator and as one switch pole which completes a circuit when it touches the adjustable limit contact. Contacts are grounded through the case and have a self-cleaning motion to ensure electrical continuity. Specifically designed to protect engines and equipment in oil field, marine, irrigation, construction and trucking applications to monitor water pump pressure. Exceeds SAE standards.

Features:

• 2 inch/51 mm Dial
• Steel Case Coated to Resist Corrosion
• Polycarbonate, Break-Resistant Lens
• Polished, Stainless Steel Bezel
• Combination Indicating Gage and Limit Switch
• Switch Can Activate Alarms and/or Shutdown Equipment
• Exceeds SAE Standards
• Semi-Automatic Lockout
• K = Knob Adjusting Face Contact
• HL = High and Low Contacts
  

Specifications:

• Part No.: 20PW7-HLK-200
• Range: 0-200 psi (1.4 MPa) [14 bar]
• Maximum Pressure: 2 x scale
• Standard Settings: 50 psi (345 kPa) [3.0 bar]
• High Settings: 150 psi (1 MPa) [10 bar]
• Dial: White on black, dual scale; U.S.A. standard scale is psi/kPa
• Case: Plated steel; mounting clamp included (except for direct mount models)
• Bezel: Polished stainless steel
• Lens: Polycarbonate, high-impact
• Oil: Silicon Oil
• Temperature Range: Ambient: -40°F (-40°C) thru 150°F (66°C); Process: -40°F (-40°C) thru 250°F (121°C)
• Process Connection: 1/8-27 NPTM brass
• Sensing Element: Beryllium copper diaphragm
• Adjustable Limit Contact: SPST contact; pilot- duty only, 2 A @ 30 VAC/DC; Normally Close (NC) when the low limit is met. Normally Open (NO) when pointer is in normal operating range. Contacts are gold flashed silver
• Limit Contact Adjustment: by a 1/16 in. hex wrench thru 100% of the scale
• Limit Contact Wire Leads: 18 AWG (1.0 mm2) x 12 in. (305 mm)
• Unit Weight: 8 oz. (0.23 kg)
• Unit Dimensions: 3 x 3 x 3 in. (76 x 76 x 76 mm)

Literature:

Installation Instructions


MurCal is an Authorized Distributor of Murphy by Enovation products.
MurCal provides experienced application and product support, before and after the sale.

For California customers: Prop 65 WARNING: This product may have been manufactured with or uses components that can expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.p65warnings.ca.gov.