»
»
G-Series Medium-Flow Pressure Relief Valves
EnglishChinese (Simplified)FinnishFrenchGermanItalianJapaneseKoreanPortugueseSpanishTurkish

Griffco G-Series medium-flow pressure relief valves are designed to protect chemical feed systems from over pressure damage caused by defective equipment or a blockage in the chemical feed line. Robust construction ensures reliability in the rigorous service of municipal and industrial applications. Also called bypass pressure valves.

G-Series Medium-Flow Pressure Relief Valves

Valve Features

  • Anti-siphon function
  • 2-port and 3-port configurations (90° and 180°)
  • Solid, robust, machined construction
  • Flanged, union, threaded and socket connection options
  • Molded Noryl top with integral hardware locking
  • 316L SS metal valve and top options
  • Molded PTFE/EPDM diaphragm
  • Adjustable up to 350 psi (24 bar)
  • 4 optional pressure ratings (springs)
  • Valve sizes from 1/2" to 4" or DN 15 to DN 100
  • Tamper-resistant adjustment screw
  • High-temperature option up to 300°F (149°C)

Griffco Benefits

  • High reliability at affordable price
  • Long diaphragm life
  • Wide range of valve materials
  • Multiple diaphragm material options
  • Factory or field settable

Available Sizes

  • 1/2" to 4" or DN 15 to DN 100

Wetted Materials

  • PVC
  • CPVC
  • Polypropylene
  • PVDF
  • PTFE

 

  • Halar®
  • 316 SS
  • Alloy 20
  • Hastelloy® C

G-Series PRG - Specifications

G-Series PRG - Data Sheets

TitleDescriptionDate modifiedDownload
Data Sheet PRG (US) Imperial09-14-2020 Download
Data Sheet PRG (Intl) Metric09-14-2020 Download
Data Sheet PRG (Spanish) Metric09-14-2020 Download

G-Series PRG - IOM Manuals

TitleDescriptionDate modifiedDownload
IOM Manual PRG (US) Imperial05-21-2021 Download
IOM Manual PRG 3" & 4" (DN 80 & DN 100) Imperial09-14-2020 Download
IOM Manual PRG (Spanish) Metric09-14-2020 Download

G-Series PRG - Dimensional Drawings

G-Series 3-Port @ 180° (1/2" - 1") (DN 15 - DN 25)

G-Series 2-Port @ 180° (1/2" - 1") (DN 15 - DN 25)

G-Series 2-Port @ 180° (1-1/2"- 2") (DN 40 - DN 50)

TitleDescriptionDate modifiedDownload
Dim PRG2 2Port@180 Threaded US 1-1/2"- 2"08-24-2020 Download
Dim PRG2 2Port@180 Threaded Metric DN 40 - DN 5008-24-2020 Download
Dim PRG2 2Port@180 Socket US 1-1/2"- 2"08-24-2020 Download
Dim PRG2 2Port@180 Socket Metric DN 40 - DN 5008-24-2020 Download
Dim PRG2F 2Port@180 Flanged US 1-1/2"- 2"08-24-2020 Download
Dim PRG2F 2Port@180 Flanged Metric DN 40 - DN 5008-24-2020 Download
Dim PRG2U 2Port@180 Union US 1-1/2"- 2"08-24-2020 Download
Dim PRG2U 2Port@180 Union Metric DN 40 - DN 5008-24-2020 Download

G-Series 2-Port @ 180° (3" - 4") (DN 80 - DN 100)

TitleDescriptionDate modifiedDownload
Dim PRG5 2Port@180 Flanged US 3" - 4"08-24-2020 Download
Dim PRG5 2Port@180 Flanged Metric DN 80 - DN 10008-24-2020 Download

G-Series 2-Port @ 90° (1/2" - 1") (DN 15 - DN 25)

G-Series 2-Port @ 90° (1-1/2"- 2") (DN 40 - DN 50)

TitleDescriptionDate modifiedDownload
Dim PRG290 2Port@90 Threaded US 1-1/2"- 2"08-24-2020 Download
Dim PRG290 2Port@90 Threaded Metric DN 40 - DN 5008-24-2020 Download
Dim PRG290 2Port@90 Socket US 1-1/2"- 2"08-24-2020 Download
Dim PRG290 2Port@90 Socket Metric DN 40 - DN 5008-24-2020 Download
Dim PRG290F 2Port@90 Flanged US 1-1/2"- 2"08-24-2020 Download

G-Series PRG - Sectional Drawings

TitleDescriptionDate modifiedDownload
G001 PRV 3-Port08-26-2020 Download
G002 2-Port, PRV 3-Port08-26-2020 Download

3D CAD Drawings Now Available

Three-dimensional CAD drawings are now available for you to download and use in your pumping system designs.

SHARE
Share on linkedin
Share on twitter
Share on facebook

Find Your Local Distributor

Locate an authorized Griffco Valve distributor that can provide you with sales, customer service, and technical support.

Try our New Pulsation Dampener Calculator

Protect your pumping system with the correct size Pulsation Dampener from Griffco Valve. Use the Griffco Pulsation Dampener Calculator.

The Griffco Commitment to You

Griffco strives to provide exceptional service and value to all its customers and employs talented professionals to ensure customer satisfaction.

Capabilities & Quality Certifications

Griffco Valve fully stands behind all the products it manufactures and sells. Find out more information about our quality certifications and organizations.

Receive News & Product Updates