Griffco Unibody Back Pressure Valves

griffco unibody valves, griffco m-series unibody, back pressure valves, diaphragm pressure valves, griffco, g-series unibody

Griffco's new Unibody back pressure valve is the latest innovation to ensure leak-free connections and operation. This new design allows flexibility of changing connection types, provides ease of maintenance, and eliminates additional system components (extra unions) saving time and money. As with all of the Griffco designs, the chemical feed system is safeguarded by applying a continuous back pressure to the chemical feed pump, while also acting as an anti-siphon valve. This new construction ensures increased leak-free reliability in the rigorous service of municipal and industrial applications.

warrantyWetted Materials:


Available Sizes:

1/2" to 1" or DN 15 to DN 25

Features & Benefits:

  • Solid, robust, single-piece machined construction

  • No seals or glued connections

  • Compact size for OEM applications

  • High reliability at a low cost

  • Anti-siphon function

  • Available in PVC and CPVC

  • Union style connections

  • Molded Noryl top with integral hardware locking

  • Vulcanized composite PTFE/EPDM diaphragm

  • Multiple diaphragm material options

  • Long diaphragm life

  • Adjustable up to 150 psi (10 bar)

  • 4 optional pressure ratings (springs)

  • Valve sizes from 1/2" to 1" or DN 15 to DN 25

  • Tamper-resistant adjustment screw

  • Two-year warranty

 Download Technical Data Sheet: Imperial (US) | Metric (International)

Sizes, Flow Capacities & Pressure Ratings
Size Maximum Flow Maximum Pressure
Pulsating Continuous
1/2" DN 15 260 984 15 57 150 10
3/4" DN 20 300 1,135 21 80 150 10
1" DN 25 500 1,890 26 98 150 10

Search This Site

(Search by Product Type i.e. Level or Brand Name i.e. Pulsafeeder)

Pumps And Related Liquid Handling Equipment

About Us

Vissers Sales Corp. is a Canadian distributor and representative for liquid handling equipment related to the Chemical/Industrial market. We specialize in all types of pumps, mixers, valves, process controls, level and flow controls.


Our Products

Vissers Sales Corp. has a wide variety of liquid handling products for the Chemical and Industrial industries. Industrial Pumps, Flow Control Systems, Instrumentation Products, Industrial Mixers, Metering Accessories, Industrial Systems, Filtration Products and Tank Container Systems from the world's leading manufacturers

Website Content

Vissers Sales Corp. provides an indepth Directory of Industrial Pumps featuring Centrifugal Pumps, Positive Displacement Pumps, Drum Pumps, Metering Pumps, Tote Pumps from the world's leading manufacturers available at Vissers Sales Corp.. We offer a wide variety of products to meet your unique needs.

Get in Touch

  • Phone:
  • Email:
    Email Us Here
  • Address:
    20-220 Industrial Parkway South
    Aurora, ON L4G 3V6
  • Website: