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NVIDIA Quadro NVS 295
NVIDIA Quadro NVS 295

YOUYAN QJH-25WL

  • Product Name:​ High-Pressure Ball-Type Shutoff Valve (QJH-25WL)
  • Product Introduction:​ Manual high-pressure ball core shutoff valve from the QJH series, intended for on/off isolation in hydraulic and fluid power systems rather than throttling service.
Category:
Description
  • Technical Specifications:
    • Nominal Diameter (DN):​ 25 mm
    • Pressure Rating:​ 31.5 MPa working, 50 MPa test
    • Connection:​ External thread (WL = outer threaded), M42×2
    • Medium:​ Mineral oil, water-glycol, emulsion
    • Temperature Range:​ −20 °C to +62 °C (some listings extend to +80 °C)
    • Body Material:​ Carbon steel or stainless steel
    • Ball/Stem Material:​ Hardened steel / stainless steel
    • Seal Material:​ NBR or FKM (depending on medium), PTFFE seat optional
    • Weight:​ Approx. 1.9 kg
  • Structural Features:​ Floating ball design, blow-out proof stem, 90° quarter-turn lever operation, compact forged body, full bore or reduced bore option.
  • Working Principle:​ Rotating the lever 90° aligns or blocks the spherical bore; metal-to-PTFE sealing ensures tight shutoff under high pressure.
  • Application Scenarios:​ Hydraulic power units, injection molding machines, press manifolds, offline filtration loops.
  • Installation Requirements:​ Thread seal with PTFE tape or anaerobic compound, support pipe to avoid side load on threads, align flow direction not critical for bidirectional ball valve.
  • Usage Notes:​ Not for continuous throttling; operate fully open or fully closed; relieve pressure before disassembly; verify seal material against medium temperature.
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