Kent Gate Valves – Pressure Seal

Kent Pressure Seal Gate Valves are designed for high-pressure, high-temperature applications across a wide range of fluids, except where severe coking may occur. Their rugged construction and advanced pressure seal mechanism make them a reliable choice for nuclear steam generating stations, thermal power plants, and industrial/chemical plants.

Categories: Valves
Brand: KENT VALVE

Working Principle

The valve uses a pressure-seal bonnet system:

• Initial tightening of the bonnet bolts compresses the gasket and achieves sealing.
• As system pressure rises, the line pressure further enhances gasket compression, reducing the possibility of leakage at the body/bonnet joint.
• This self-energizing sealing mechanism ensures superior performance at elevated pressures.

Key Features & Benefits

• • Design Compliance: API 600, ASME B16.34, MSS SP-144.
  • Operation: Available in handwheel or gear-operated types (depending on size).
  • Robust Construction: Cast body with precisely machined integral flanges.
  • Flexible Sealing: One-piece flexible wedge is standard; solid wedge available on request.
  • Quick Operation: Rising stem with precision ACME threads (single or double start).
  • Emission Control: Polished stem sealing area; fugitive emission compliance to API 624 and ISO 15848-1.
  • Packing & Maintenance:
    – Live loading on stem packing (optional).
    – Back seat (threaded or welded) allows packing replacement under line pressure.
    – Live loading of bonnet bolts available for F91/C12A valves.
  • Sealing Integrity: Seat rings welded in or integral to provide bubble-tight shutoff.
  • Durability: Two-piece gland and gland flange reduce stem wear.
  • Over-Pressure Safety: Optional by-pass arrangement for over-pressure protection.
  • Special Services: NACE compliance to MR-01-75 or MR-01-03.
  • Automation Options: Can be supplied with hydraulic or electric actuators, limit switches, and accessories.
  • Reliability: Proven robust stem–wedge connection, tested per API RP 591 Annex B.