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Explore our core selection of high-durability wafer non-return (NRV) and check valves, manufactured for optimal backflow prevention, low head loss, and zero-slam dynamic closing in critical American systems.
Addressing the escalating demand for compact, energy-efficient backflow prevention across United States municipal, manufacturing, and energy projects.
The industrial fluid handling landscape across the United States is undergoing a rapid modernization cycle. As federal infrastructure investments, domestic re-shoring of semiconductor chip manufacturing in the Southwest (Arizona, Texas, and Ohio), and massive expansion in Gulf Coast petrochemical facilities accelerate, the requirement for robust, space-saving, and non-slam check valves has reached an all-time high. Custom Wafer Type Non-Return Valves (NRV)—predominantly dual-plate, single-disc swing, and spring-assisted axial configurations—have become the preferred standard among American piping engineers and mechanical contractors.
Unlike bulky conventional swing check valves with extended flanged bodies, wafer type NRVs offer an ultra-compact face-to-face dimension adhering to API 594 and ASME B16.10. This compact design reduces piping weight by up to 75%, conserves valuable mechanical footprint in high-density skids, modular water filtration units, and marine engine rooms, and significantly lowers structural reinforcement and logistics costs for EPC project managers across North America.
Integrated Inconel or stainless steel torsional springs force dual plates shut prior to reverse flow initiation, effectively suppressing pressure surges and catastrophic pipe shock.
Engineered for lightweight flangeless installation between ASME Class 125, 150, 300, or AWWA companion flanges without requiring specialized support hangars.
Precision-cast ASTM A536 ductile iron, WCB cast steel, 316SS, Hastelloy, and aluminum bronze discs paired with vulcanized EPDM, NBR, Viton, or PTFE resilient seating.
Our custom wafer type NRV valves serve diverse and rigorous operational environments across all fifty states:
Engineered to withstand extreme cyclic stresses, corrosive chemical streams, and rigorous third-party certifications.
As an authoritative valve manufacturing partner for United States importers, stockists, and mechanical contractors, we implement end-to-end quality protocols conforming to ISO 9001, API 598 pressure testing, and NSF/ANSI 61 & 372 lead-free drinking water compliance. Our fully automated CNC machining centers and coordinate measuring machines (CMM) ensure tight dimensional tolerances on every disc hinge, pin retainer, and elastomer seat recess.
Custom OEM engineering capabilities include customized spring torque ratings for horizontal, vertical up-flow, or pulsating compressor discharge runs; specialized resilient seat bonding for high-vacuum service; and custom exterior coatings including 250-micron fusion-bonded epoxy (FBE) compliant with AWWA C550.
Factory-calibrated dual springs tailored to opening pressures as low as 0.05 bar (0.7 PSI) to optimize low-head gravity lines and energy-sensitive pumping loops.
Every single wafer valve undergoes hydrostatic shell and high/low pressure pneumatic seat tightness testing in complete accordance with API 598 standards.
Full documentation suites including MTRs (EN 10204 3.1), certificate of origin, dimensional drawings, and customized barcode packaging for wholesale distribution centers.
In addition to our wafer NRV check valve lineup, KR Valve manufactures an extensive range of precision-engineered industrial valves for water, steam, gas, and slurry infrastructure.
Contact our technical sales team for CAD drawings, API 594 engineering submittals, or factory-direct OEM pricing on custom wafer type NRV and check valves.
