Hydraulic Pressure/Vacuum Relief Valves - H1 / HM1 Series | Product Series

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Hydraulic Pressure/Vacuum Relief Valves - H1 / HM1 Series Hydraulic Pressure/Vacuum Relief Valves - H1 / HM1 Series

Hydraulic Pressure/Vacuum Relief Valves - H1 / HM1 Series

Where to Buy

Parker's pressure/vacuum relief valves are designed for use with pressurized reservoirs to prevent pump cavitation by maintaining positive tank pressure and filtering incoming air.

Technical Specifications

  • For Fluid Type: Hydraulic
  • Maximum Operating Pressure: 60 psi
  • Filter Type: Bronze, 10 micron
  • Maximum Operating Temperature: -40 °F
  • Actuation Type: Mechanical
  • Minimum Operating Temperature: 250 °F
  • Pressure Control Range: 5 to 50 psi
  • Maximum Flow Rate: N/A gal/min
  • Vacuum Relief Pressure: 0.3 psi
  • Seal Material: Elastomeric
  • Body Material: Steel
Safety Warning

Full Product Description

H1 - HM1 Series Pressure/Vacuum Relief Valves are used to maintain positive pressure in hydraulic reservoirs. The compact size, reusable bronze filter and high flow characteristics make this valve a popular choice. The HM1 version offers the same features and characteristics as the H1 Series with the option of a manual over ride function. This feature allows the operator to relieve the reservoir pressure before opening the tank for refilling, inspection or servicing. The H1 - HM1 Series are available in a wide range of pressure relief settings from 5 psi to 50 psi (in 5 psi increments) and a vacuum relief setting of 0.3 psi.

Technical Characteristics:
• Pressure Relief Setting Options (psi): 5, 10, 15, 20, 25, 30, 35, 40, 45, 50
• Vacuum Relief Setting (psi): 0.3
• Filter: 10 micron, nominal
• Filter Type: Bronze - reusable
• Thread Sizes: 3/8"", 1/2"", 3/4"", 1""
• Port Ends: Male pipe thread, Male O-ring Boss - SAE threads
• HM1 version: Manual pressure relief button

Markets:  
• General Hydraulics
• Industrial
• Construction
• Agriculture

Features/Benefits:  
• Combines the functionality of two valves and a filter in one unit
• Bronze filter can be easily removed to be cleaned and reused
• Compact size
• High flow
• Wide variety of pressure relief settings
• HM1 has a manual pressure relief button

Applications:  
• Hydraulic tanks and reservoirs

Related Documents

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Products Cracking Pressure (psi) Connection Thread Size (inch) Special Options Thread Type
H1-02-12MP 2 3/4 - 14 na Male NPTF
H1-05-12MP 5 3/4 - 14 na Male NPTF
H1-05-16MP 5 1 - 11 1/2 na Male NPTF
H1-05-6MP 5 3/8 - 18 na Male NPTF
H1-20-12MP 20 3/4 - 14 na Male NPTF
H1-30-12MP 30 3/4 - 14 na Male NPTF
HM1-05-12MP 5 3/4 - 14 Manual pressure relief button Male NPTF
HM1-10-12MP 10 3/4 - 14 Manual pressure relief button Male NPTF
HM1-10-6MP 10 3/8 - 18 Manual pressure relief button Male NPTF
HM1-15-12MP 15 3/4 - 14 Manual pressure relief button Male NPTF

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