NV-1 Contact us about Welker Key Features Soft Seat Design Low Operating Torque Ported With a Globe Design Blow-out Proof Stem With Durable Construction Key Benefits Positive Shut-Off Easily Opens and Closes Under Pressure Less Prone to Develop Leaks Safe to Operate at High Pressure Leak Protection WELKER PRODUCT AREAS Instrumentation Hydrogen Instrument Grade Gas Conditioning Odorization Filtration Light Liquid Sampling Natural Gas Sampling View all Welker Products