Featured Categories

  • Tools & Machining
  • Shipping, Packaging & Office Supplies
  • Plumbing
  • Safety

Shop Categories

  • Abrasives & Polishers
  • Adhesives & Tapes
  • Electrical Supplies
  • Electronics
  • Fasteners
  • Food Service & Restaurant Supplies
  • Furniture, Linens & Decor
  • Grounds & Outdoor
  • Hardware & Building Materials
  • Heating & Cooling
  • Janitorial & Cleaning Supplies
  • Lab Equipment & Supplies
  • Lighting
  • Material Handling
  • Medical & Personal Care
  • Paint, Coatings & Supplies
  • Plumbing
  • Power Transmission
  • Pumps
  • Raw Materials
  • Safety
  • Shipping, Packaging & Office Supplies
  • Storage & Workspace
  • Test Instruments & Gauges
  • Tools & Machining
  • Vehicle Maintenance
  • Welding, Soldering & Brazing
  • About Us
  • Deals
  • Contact Us
Added to Cart
Skip to Main Content
FREE SHIPPING on orders over $50 after you . Restrictions Apply
Zoro Homepage
Close icon
Clipboard Icon Clipboard Icon Quick Order
User Headset Icon User Headset Icon Customer Service
Cart Icon
0
Cart Icon
0
Cart
  • Low prices on everyday needs. Shop Zoro Select
  • Don't miss these limited time offers. Shop All Deals
  • Get 30 days to pay with Net 30. Apply Now
  1. Home
  2. /
  3. Plumbing
  4. /
  5. Pipes, Valves & Fittings
  6. /
  7. Valves
  8. /
  9. Relief Valves

Relief Valves (2,000+ items) - Page 24

Aquatrol Safety Valve, 25 psi, 2 MNPT x 2 FNPT 570HH1M1K1-25
Aquatrol

Safety Valve, 25 psi, 2 MNPT x 2 FNPT

Zoro # G6989433
Mfr # 570HH1M1K1-25
product price:  $457.99
/ea
Aquatrol Sfty Vlv, 175 psi, 1 1/2 MNPT x 2 FNPT SRS 742GH1M1K1-175
Aquatrol

Sfty Vlv, 175 psi, 1 1/2 MNPT x 2 FNPT SRS

Zoro # G6983632
Mfr # 742GH1M1K1-175
product price:  $1,528.99
/ea
Aquatrol Sft Vl, 350 psi, 1 1/4 MNPTx1 1/2 FNPT SRS 743FH1M2J1-350
Aquatrol

Sft Vl, 350 psi, 1 1/4 MNPTx1 1/2 FNPT SRS

Zoro # G6986581
Mfr # 743FH1M2J1-350
product price:  $1,570.99
/ea
Aquatrol Sfty Vlve, 200 psi, 3/4 MNPTx1 FNPT Series 741EC1M2J1-200
Aquatrol

Sfty Vlve, 200 psi, 3/4 MNPTx1 FNPT Series

Zoro # G6982147
Mfr # 741EC1M2J1-200
product price:  $456.99
/ea
Aquatrol Safety Valve, 125 psi, 3/4 MNPT x 3/4 FNPT 570DD1M1K1-125
Aquatrol

Safety Valve, 125 psi, 3/4 MNPT x 3/4 FNPT

Zoro # G6988569
Mfr # 570DD1M1K1-125
product price:  $200.99
/ea
Aquatrol Sfty Vlv, 50 psi, 2 MNPTx2 1/2 FNPT Sries 741HJ1M1K1-50
Aquatrol

Sfty Vlv, 50 psi, 2 MNPTx2 1/2 FNPT Sries

Zoro # G6981550
Mfr # 741HJ1M1K1-50
product price:  $1,279.99
/ea
Aquatrol Safety Valve, 100 psi, 1 MNPTx1 FNPT Sries 741DG1M2J1-100
Aquatrol

Safety Valve, 100 psi, 1 MNPTx1 FNPT Sries

Zoro # G6981928
Mfr # 741DG1M2J1-100
product price:  $360.99
/ea
Dixon Cartridge Double Spring Piston Intake Relief Valve, 4 in, MNST NH x 2 Female Swivel NST NH, 28 FMGR40F40F
Dixon

Cartridge Double Spring Piston Intake Relief Valve, 4 in, MNST NH x 2 Female Swivel NST NH, 28

Zoro # G209216773
Mfr # FMGR40F40F
product price:  $3,397.99
/ea
Aquatrol Sfty Vlv, 200 psi, 1 1/4 MNPT x 1 1/4 FNPT 560FF1M1A1-200
Aquatrol

Sfty Vlv, 200 psi, 1 1/4 MNPT x 1 1/4 FNPT

Zoro # G6987677
Mfr # 560FF1M1A1-200
product price:  $298.99
/ea
Aquatrol Safety Valve, 100 psi, 3/4 MNPT x 1 FNPT 560ED1M1A1-100
Aquatrol

Safety Valve, 100 psi, 3/4 MNPT x 1 FNPT

Zoro # G6987421
Mfr # 560ED1M1A1-100
product price:  $206.99
/ea
Aquatrol Sfty Vlve, 175 psi, 3/4 MNPT x 1 FNPT SRS 742EC1M1K1-175
Aquatrol

Sfty Vlve, 175 psi, 3/4 MNPT x 1 FNPT SRS

Zoro # G6983090
Mfr # 742EC1M1K1-175
product price:  $777.99
/ea
Aquatrol Sfty Vlv, 300 psi, 1 MNPT x 1 FNPT Series 742EG1M1K1-300
Aquatrol

Sfty Vlv, 300 psi, 1 MNPT x 1 FNPT Series

Zoro # G6983343
Mfr # 742EG1M1K1-300
product price:  $863.99
/ea
Aquatrol Safety Valve, 50 psi, 2 MNPT x 2 FNPT 560HH1M1A1-50
Aquatrol

Safety Valve, 50 psi, 2 MNPT x 2 FNPT

Zoro # G6988042
Mfr # 560HH1M1A1-50
product price:  $458.99
/ea
Aquatrol Safety Valve, 400 psi, 1 x 1 Series 741EG1M2J1-400
Aquatrol

Safety Valve, 400 psi, 1 x 1 Series

Zoro # G6982241
Mfr # 741EG1M2J1-400
product price:  $481.99
/ea
Aquatrol Sfty Vlv, 500 psi, 2 MNPTx2 1/2 FNPT Sries 742HJ1M2J1-500
Aquatrol

Sfty Vlv, 500 psi, 2 MNPTx2 1/2 FNPT Sries

Zoro # G6984947
Mfr # 742HJ1M2J1-500
product price:  $2,131.99
/ea
Aquatrol Sfty Vlve, 75 psi, 1 1/4 MNPT x 1 1/4 FNPT 560FF1M1A1-75
Aquatrol

Sfty Vlve, 75 psi, 1 1/4 MNPT x 1 1/4 FNPT

Zoro # G6987607
Mfr # 560FF1M1A1-75
product price:  $297.99
/ea
Aquatrol Safety Valve, 25 psi, 1 1/2 MNPT x 2 FNPT 560HG1M1A1-25
Aquatrol

Safety Valve, 25 psi, 1 1/2 MNPT x 2 FNPT

Zoro # G6987902
Mfr # 560HG1M1A1-25
product price:  $389.99
/ea
Aquatrol Sfty Vlv, 250 psi, 2 MNPTx2 1/2 FNPT Sries 743HJ1M2J1-250
Aquatrol

Sfty Vlv, 250 psi, 2 MNPTx2 1/2 FNPT Sries

Zoro # G6986800
Mfr # 743HJ1M2J1-250
product price:  $2,829.99
/ea
Aquatrol Sfty Vlv, 25 psi, 1 1/2 MNPT x 1 1/2 FNPT 560GG1M1A1-25
Aquatrol

Sfty Vlv, 25 psi, 1 1/2 MNPT x 1 1/2 FNPT

Zoro # G6987878
Mfr # 560GG1M1A1-25
product price:  $354.99
/ea
Apollo Valves VLV, REL, J ORI, 2in, 521SER, (SS TRIM, LOW PRESS, LOOSE) 521JHBZMX
Apollo Valves

VLV, REL, J ORI, 2in, 521SER, (SS TRIM, LOW PRESS, LOOSE)

Zoro # G922711555
Mfr # 521JHBZMX
product price:  $7,610.99
/ea
Aquatrol SAFETY VLV, 50 psi, 1 MNPT x 1 FNPT Series 742EG1M1K1-50
Aquatrol

SAFETY VLV, 50 psi, 1 MNPT x 1 FNPT Series

Zoro # G6983249
Mfr # 742EG1M1K1-50
product price:  $905.99
/ea
Aquatrol Safety Valve, 200 psi, 1 MNPT x 1 1/4 FNPT 560FE1M1A1-200
Aquatrol

Safety Valve, 200 psi, 1 MNPT x 1 1/4 FNPT

Zoro # G6987543
Mfr # 560FE1M1A1-200
product price:  $254.99
/ea
Aquatrol Sfty Vlv, 225 psi, 1 1/2 MNPTx2 FNPT Sries 742GH1M2J1-225
Aquatrol

Sfty Vlv, 225 psi, 1 1/2 MNPTx2 FNPT Sries

Zoro # G6984737
Mfr # 742GH1M2J1-225
product price:  $1,573.99
/ea
Aquatrol Sfty Vlv, 400 psi, 1 1/2 MNPTx2 FNPT Sries 742GH1M2J1-400
Aquatrol

Sfty Vlv, 400 psi, 1 1/2 MNPTx2 FNPT Sries

Zoro # G6984691
Mfr # 742GH1M2J1-400
product price:  $1,462.99
/ea
Aquatrol Sfty Vlv, 175 psi, 1 1/2 MNPTx2 FNPT Sries 742GH1M2J1-175
Aquatrol

Sfty Vlv, 175 psi, 1 1/2 MNPTx2 FNPT Sries

Zoro # G6984658
Mfr # 742GH1M2J1-175
product price:  $1,462.99
/ea
Aquatrol Safety Valve, 175 psi, 3/4 MNPT x 3/4 FNPT 560DD1M1A1-175
Aquatrol

Safety Valve, 175 psi, 3/4 MNPT x 3/4 FNPT

Zoro # G6987327
Mfr # 560DD1M1A1-175
product price:  $203.99
/ea
Aquatrol Sft Vl, 200 psi, 1 1/4 MNPTx1 1/2 FNPT SRS 742FH1M2J1-200
Aquatrol

Sft Vl, 200 psi, 1 1/4 MNPTx1 1/2 FNPT SRS

Zoro # G6984527
Mfr # 742FH1M2J1-200
product price:  $1,089.99
/ea
Aquatrol Sfty Vlve, 250 psi, 3/4 MNPT x 1 FNPT SRS 742EC1M1K1-250
Aquatrol

Sfty Vlve, 250 psi, 3/4 MNPT x 1 FNPT SRS

Zoro # G6983188
Mfr # 742EC1M1K1-250
product price:  $777.99
/ea
Dixon Cartridge Double Spring Piston Intake Relief Valve, 4-1/2 in, MNST NH x 2 Female Swivel NST NH FMGR45F45F
Dixon

Cartridge Double Spring Piston Intake Relief Valve, 4-1/2 in, MNST NH x 2 Female Swivel NST NH

Zoro # G109216781
Mfr # FMGR45F45F
product price:  $3,397.99
/ea
Conbraco 3/4 in. F 150# T&P 5 in. ele 1.912mBTU 18C-512-5-150
Conbraco

3/4 in. F 150# T&P 5 in. ele 1.912mBTU

Zoro # G309236176
Mfr # 18C-512-5-150
product price:  $277.99
/ea
Aquatrol Sfty Valve, 175 psi, 1 MNPT x 1 FNPT Sries 741DG1M1K1-175
Aquatrol

Sfty Valve, 175 psi, 1 MNPT x 1 FNPT Sries

Zoro # G6980963
Mfr # 741DG1M1K1-175
product price:  $345.99
/ea
Aquatrol Sfty Vlv, 300 psi, 1 MNPT x 1 FNPT Series 743EG1M1K1-300
Aquatrol

Sfty Vlv, 300 psi, 1 MNPT x 1 FNPT Series

Zoro # G6985452
Mfr # 743EG1M1K1-300
product price:  $1,263.99
/ea
Aquatrol Sfty Vlv, 175 psi, 2 MNPT x 2 1/2 FNPT SRS 742HJ1M1K1-175
Aquatrol

Sfty Vlv, 175 psi, 2 MNPT x 2 1/2 FNPT SRS

Zoro # G6983739
Mfr # 742HJ1M1K1-175
product price:  $2,167.99
/ea
Apollo Valves VLV, REL, 2H2, 19K, PFA, 146PSI, BRZ (UV AIR) 19KHHK146
Apollo Valves

VLV, REL, 2H2, 19K, PFA, 146PSI, BRZ (UV AIR)

Zoro # G122710655
Mfr # 19KHHK146
product price:  $866.99
/ea
Aquatrol Sfty Vlv, 250 psi, 1 1/2 MNPTx2 FNPT Sries 743GH1M2J1-250
Aquatrol

Sfty Vlv, 250 psi, 1 1/2 MNPTx2 FNPT Sries

Zoro # G6986907
Mfr # 743GH1M2J1-250
product price:  $2,380.99
/ea
Aquatrol Sfty Vlv, 125 psi, 1/2 MNPTx3/4 FNPT Sries 741DC1M2J1-125
Aquatrol

Sfty Vlv, 125 psi, 1/2 MNPTx3/4 FNPT Sries

Zoro # G6981751
Mfr # 741DC1M2J1-125
product price:  $340.99
/ea
Relief Valves (2,000+ items) - Page 24
  • First
  • Previous
  • 24
    of 65 pages
  • Next
  • Last
How was your search?

About Relief Valves

Relief Valves are safety valves that regulate the pressure of a system. They can be used to protect the system from overpressure or to maintain a certain pressure in the system. There are various types of relief valves, each designed for different applications and purposes.

Types of Relief Valves

Pressure relief valves, safety relief valves, and other types of relief valves all serve different purposes and have unique features that make them suitable for specific applications. Pressure relief valves are designed to open at a predetermined pressure to relieve excess pressure from the system while safety relief valves provide emergency protection against overpressure.

How Relief Valves are Made

Relief Valves are typically made with metal bodies and valve discs, such as stainless steel or brass. The valve disc is usually connected to a spring which helps keep it closed until the set pressure is reached. Additionally, some Relief Valves use compounds like rubber or plastic seals in order to ensure proper operation.

Industries that use Relief Valves

Relief Valves can be found in a variety of industries including oil and gas production, power generation, chemical processing, water treatment plants, and more. Professionals in these industries rely on Relief Valves as an important part of their operations because they help protect systems from dangerous overpressure scenarios.

Find the Relief Valves You Need at Zoro

Looking for a specific item? Use our robust search tool to find it by name or keyword, or use our handy filters to narrow down our full assortment. You can also check out our whole selection of plumbing tools & supplies, along with other equipment and essentials to ensure you have all you need to tackle the job, especially if you're taking on a DIY project for the first time.
Plus, when you shop at Zoro, you'll always enjoy competitive prices on tons of great brands you know and trust. We make the shopping experience as fast and seamless as possible with free shipping on orders over $50 for registered users, Net 30 payment terms for qualifying customers, and an unparalleled customer service experience.

Related Categories

Ball ValvesCheck ValvesValve PartsSolenoid ValvesBlack Pipe Fittings
PVC Pipe FittingsStainless Steel Pipe FittingsCamlock FittingsBrass Pipe FittingsCopper Fittings
presure relief valveair vacuum valverelief vavlevalve vacuum reliefplast-o-matic 2" ball valve
aquatrol adjustable relief valvevalve relief75 psi relief valve1" safety valve2" steam valve

Sign up and save

Take 10% off your next order when you sign up for Zoro emails. Subscribe now to receive your promo code via email.

Follow us

  • Facebook
  • YouTube
  • LinkedIn
  • Instagram
Every part plays a part

Information

  • About Us
  • Accessibility
  • Careers
  • Inclusion
  • Giving Back
  • Resource Hub
  • Returns
  • Shipping

Shopping

  • Brands
  • Collections
  • My Account
  • Payments
  • Deals
  • Sitemap
  • Track My Order

Services

  • Customer Service
  • FAQs
  • Net 30 Terms
  • Reseller Program
  • Sell on Zoro
  • Participate in Research

Zoro, Inc

Connect

Customer service from real people

  • Phone: (855) 289-9676
  • Contact Us

© 2011-2026 Zoro Tools, Inc. All rights reserved.
  • Terms & Conditions
  • Terms of Access
  • Privacy Policy
Zoro, Inc