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Quality Control

In order to the further development, the NFC established the CAD valve design center, the new production research center, 3D analog design system and valve testing center. It should be mentioned that the valve testing center is equipped with advanced processing machineries.Direct reading spectrum analyzer,the valve curved bench,low temperature impact test machine,tensile testing machine,digital valve testing machine,torque and life test device,physical and chemical analysis laboratory,impact fatigue test device. With scientific and comprehensive test machines, VMV make the quality of product ininternational level and provide you products in good quality. VMV has become a fastest growing and leadingenterprisein China. With careful operation and strict check, our products are in good quality. Strict attitude created excellent quality of VMV.

Products Category

Longer Bellows Globe Valve-ADVANTAGES

  • Stem :2-part rising stem with outside roll-formed thread; stem coupling with bellows anti-torque device .

  • Bellow : Multiple wall, fully flushed stainless steel bellows, secured against torsion, designed for 10,000 cycles; fully welded

  • 360º free rotation disc that allows the cleaning of impurities that can carry the fluid to make the closure on the different surfaces of the seat, at the same time, it does not transmit the vibrations to the valve stem.

  • Conically shaped plug made of hardened chromium steel 1.4021/AISI 420, or hard-surfaced with stellite 6; body seat hard-surfaced with stainless steel 1.4370/ AISI 307 or stellite 21

  • Metal back seat with stroke limiter in open position and bellows anti-vibration device