External thread VCR check valve

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External thread VCR check valve

The VCR check valve is a spring-loaded check valve designed specifically for ultra-high-purity (UHP) gas systems. It features a one-piece body machined from 316L-VAR (Vacuum Arc Remelting) high-purity stainless steel, with VCR male connections at both ends that utilize metal gaskets to achieve a metal-to-metal seal. It is engineered to prevent media backflow, gas cross-contamination, and back-pressure intrusion in UHP piping. Unlike standard threaded or compression-fitting check valves, this product targets applications such as semiconductor manufacturing, specialty gas cabinets, VMB panels, and high-purity hydrogen systems; it meets stringent cleanliness standards and offers an extremely low helium leak rate. It allows forward flow and automatically closes via spring action when the pressure differential dissipates. It operates reliably in any mounting orientation, protecting components such as filters, pressure regulators, and process chambers from reverse pressure surges. VCR locking nuts and metal gaskets are consumables and must be ordered separately.

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Ningbo Keshengli Stainless Steel Valve Co., Ltd.
Ningbo Keshengli Stainless Steel Valve Co., Ltd.

It is External thread VCR check valve Suppliers and External thread VCR check valve Factory.Our company specializes in the manufacturing and sales of stainless steel pipe fittings and valves in national (GB), American (ANSI/ASME), and British (BS) standards. We are equipped with advanced CNC machining centers, material testing and heat treatment facilities, a skilled technical team, and a robust production workforce. With a sound quality management system and excellent after-sales service, we sincerely serve customers worldwide.

Our main products include: ferrule-type fittings, threaded fittings, instrument fittings, instrument needle valves, instrument ball valves, ferrule needle valves, ferrule ball valves, compact high-pressure instrument needle valves, compact high-pressure instrument ball valves, and high-pressure check valves. The primary material is SS316 stainless steel. These products are widely used in petrochemical, petroleum, electric power, pharmaceutical, food, papermaking, marine, and general machinery industries.

We strictly control product quality at every stage and are committed to delivering superior quality through advanced technology and professional management. Adhering to the business philosophy of "Quality First, Customer Supreme, Integrity Foremost," we strive to build the "NB-KSL" brand image, better serve our customers, and work together with you to create a prosperous future.

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