Our walk-in store will open Tomorrow at 8am. Visit Store >
Toggle Nav
My Cart 0

NPT High Pressure & Vacuum Safety Relief Valves (PRVs)

NPT Safety PRVs

Sanitary Stainless Steel Fittings

High Pressure Relief Valves

Glacier Tanks' line of high pressure relief safety valves are brass constructed, have a threaded male NPT inlet connection with a stainless steel pull ring for manual pressure relief. The brass body, brass valve seat, and the zinc plated steel spring resist corrosion and can be used in operating temperatures up to 250°F. The safety valve is rated by the American Society of Mechanical Engineers (ASME) with a UV mark for pressure vessel safety. The preset pressure rating is accurate to within 3% and the silicone O-ring provide a leak proof seal.

Pressure Relief Valve Application

Relief valves release excess pressure or vacuum from a system. The valve opening allows fluids or gases to escape decreasing pressure, and closing once pressure reaches a level below the preset limit. This works inversely for vacuums where gas is allowed to pass into the system until the low-pressure limit is reached and the valve closes. A relief valves may an adjustment setting allowing modification to the pressure ratings where the valve opens, making it versatile for multiple applications. Relief valves are rated accordingly by the volume of liquid or gas they can pass and whether the construction material is suitable for a fluid or gas, which may either be corrosive in nature or operate at an extreme temperature. Relief valves are often found in a variety of applications including air compressors, petrochemical and chemical manufacturing, natural gas processing, and even power generation.

National Pipe Taper (NPT) are a standardized fitting that is commonly used for joining pipe. Due to the tapered threads (wider diameter at the base of the threads, similar to a trapezoid) the male fitting will tighten the further it is threaded into the female. NPT follows the technical standards provided by the American National Standard Pipe Thread standards, often called national pipe thread, which is often where the confusions with NPT arises, as NPT is specifically an acronym that refers to tapered pipe.

California Proposition 65 Warning:

This product can expose you to chemicals, including lead, which are known to the State of California to cause cancer and birth defects (or other reproductive harm). For more information go to www.p65Warnings.ca.gov.

Open Filters

25 Items

Set Descending Direction
per page
SKU Item Price
PRV-ST25-0A100 In Stock: 0 High Pressure Relief Valve | Male NPT 1/4 in. @ 100 PSI - Brass / Silicone / ASME
$15.39 $7.77
Discontinued
$15.39 $7.77
Discontinued
PRV-ST25-0V145 In Stock: 0 High Pressure Relief Valve | Male NPT 1/4 in. @ 145 PSI - Brass / Viton / ASME
$11.76
Back Order
$11.76
Back Order
PRV-ST25-0V200 In Stock: 2 High Pressure Relief Valve | Male NPT 1/4 in. @ 200 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST25-0A250 In Stock: 12 High Pressure Relief Valve | Male NPT 1/4 in. @ 250 PSI - Brass / Silicone / ASME
$16.07 $7.77
Discontinued
$16.07 $7.77
Discontinued
PRV-ST25-0V250 In Stock: 57 High Pressure Relief Valve | Male NPT 1/4 in. @ 250 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST25-0V050 In Stock: 75 High Pressure Relief Valve | Male NPT 1/4 in. @ 50 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST25-0V075 In Stock: 47 High Pressure Relief Valve | Male NPT 1/4 in. @ 75 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST33-0A100 In Stock: 9 High Pressure Relief Valve | Male NPT 3/8 in. @ 100 PSI - Brass / Silicone / ASME
$11.19 $7.77
Discontinued
$11.19 $7.77
Discontinued
PRV-ST33-0V100 In Stock: 207 High Pressure Relief Valve | Male NPT 3/8 in. @ 100 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST33-0A150 In Stock: 141 High Pressure Relief Valve | Male NPT 3/8 in. @ 150 PSI - Brass / Silicone / ASME
$11.19 $7.77
Discontinued
$11.19 $7.77
Discontinued
PRV-ST33-0V150 In Stock: 49 High Pressure Relief Valve | Male NPT 3/8 in. @ 150 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST33-0V200 In Stock: 8 High Pressure Relief Valve | Male NPT 3/8 in. @ 200 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST33-0A250 In Stock: 23 High Pressure Relief Valve | Male NPT 3/8 in. @ 250 PSI - Brass / Silicone / ASME
$11.19 $7.77
Discontinued
$11.19 $7.77
Discontinued
PRV-ST33-0V250 In Stock: 19 High Pressure Relief Valve | Male NPT 3/8 in. @ 250 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST33-0V050 In Stock: 7 High Pressure Relief Valve | Male NPT 3/8 in. @ 50 PSI - Brass / Viton / ASME
$11.76
$11.76
PRV-ST33-0V075 In Stock: 0 High Pressure Relief Valve | Male NPT 3/8 in. @ 75 PSI - Brass / Viton / ASME
$11.76
Back Order
$11.76
Back Order
PRV-SCB5075-0A100 In Stock: 1 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 100 PSI w/ Pipe Vent Outlet - Brass / Silicone / ASME
$165.08 $106.19
Discontinued
$165.08 $106.19
Discontinued
PRV-SCB5075-0V100 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 100 PSI w/ Pipe Vent Outlet - Brass / Viton / ASME
$173.33
Special Order
$173.33
Special Order
PRV-SCB5075-0A150 In Stock: 2 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 150 PSI w/ Pipe Vent Outlet - Brass / Silicone / ASME
$165.08 $106.19
Discontinued
$165.08 $106.19
Discontinued
PRV-SCB5075-0V150 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 150 PSI w/ Pipe Vent Outlet - Brass / Viton / ASME
$173.33
Special Order
$173.33
Special Order
PRV-SCB5075-0V200 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 200 PSI w/ Pipe Vent Outlet - Brass / Viton / ASME
$173.33
Special Order
$173.33
Special Order
PRV-SCB5075-0A250 In Stock: 4 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 250 PSI w/ Pipe Vent Outlet - Brass / Silicone / ASME
$165.08 $106.19
Discontinued
$165.08 $106.19
Discontinued
PRV-SCB5075-0V250 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 250 PSI w/ Pipe Vent Outlet - Brass / Viton / ASME
$173.33
Special Order
$173.33
Special Order
PRV-SCB5075-0V050 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 50 PSI w/ Pipe Vent Outlet - Brass / Viton / ASME
$173.33
Special Order
$173.33
Special Order
PRV-SCB5075-0V075 High Pressure Relief Valve | MNPT 1/2 in. x FNPT 3/4 in. @ 75 PSI w/ Pipe Vent Outlet - Brass / Viton / ASME
$173.33
Special Order
$173.33
Special Order

25 Items

Set Descending Direction
per page

Return Policy


Glacier Tanks will accept returns of website standard stocking items, but only if:

  1. The item is new, unused, and in resalable condition;
  2. You notify Glacier Tanks and request a return authorization within 30 days of your receipt of the item;
  3. You return the item to Glacier Tanks, postage/shipping prepaid within 5 days of Glacier Tanks' return authorization (RMA);

Once your items have been received by Glacier Tanks and verified to be unused, we will refund your purchase price, less shipping costs. Returns will incur a 15% restocking fee. Return shipping costs are your responsibility and shall not be paid by Glacier Tanks.

The following items are non-returnable:

  • Special or Discounted items - labeled by button color:
    • Discontinued
    • Damaged
    • Non-conforming
    • Refurbished
    • Special Order
    • Drop Ship
    • Build-to-Order
  • Custom order
  • All Gaskets & Seals

Please be sure you understand and agree to any drawings supplied to you prior to purchase of custom or special order items. Payment of deposits for custom or special order items indicates your approval and acceptance of such custom or special order items.

Proudly Serving Our Customers

See All Reviews
Missouri Ridge Distillery & Brewery Missouri Ridge Distillery & Brewery
Mar 14, 2021 on Google Customer Reviews
Fair prices and fast shipping!!!! What else can you ask for..... Greg Pope Master Distiller
Duane Teach Duane Teach
Oct 12, 2020 on Google Customer Reviews
Great range of products and support of me, the little guy. Highly recommended, and I will look to them for future needs.
X