GNB Gate Valves      


GNB round valves are fabricated from stainless steel or mild steel. Options include:

  • Actuation: Pneumatic, Electric, Hydraulic, Manual            

  • Flanges: ASA, ISO, Conflat, Custom Designed

  • Shaft Seal: Dual O-rings, Bellows

  • Water Cooling: Flanges, Body, Gate

  • Ports: Roughing, Gauge, View


Specification Chart/CAD Drawings Available in     


GNB gate valves have been providing reliable long term service to customers for 40 years. Continual improvements in design improve life and reduce cost. Unique to the industry, all GNB gate valves seal both ways against full atmosphere pressure differential. Explanation of sealing both ways (pdf).


GNB has long been recognized as a supplier of value engineered, cost-effective chambers with reliable vacuum integrity and strength. We are capable of building round valves of any complexity.


Our technical sales staff can get GNB’s engineering involved early in the design process. GNB has experience in design applications ranging from the R&D phase into high production.


PMG - Protective Metal Guard
Designed to protect internal mechanism from process exposure.


Space Saver Gate Valve Drawings
Designed for small spaces.


Valve Model Description (pdf)
View link to better understand valve models

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