Bellows Type Forged Steel Gate Valve

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Bellows Type Forged Steel Gate Valve

Bellows Type Forged Steel Gate Valve

型号：WZ41Y
Subtitle：Zero-emission Gate Valve
The Bellows Type Forged Steel Gate Valve is a high-performance solution designed for critical isolation tasks in applications requiring zero leakage and high reliability. Featuring a forged steel body and a bellows seal, it ensures exceptional sealing performance in high-pressure, high-temperature, and hazardous environments. This valve is strictly for on/off service and not suitable for throttling.
标签：High pressure valve
分类：Forged Steel Gate Valve, Wedge Gate Valve
工况：chemical plant, High temperature and high pressure, High temperature and high pressure, High temperature and high pressure steam system
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Product Overview

The Bellows Type Forged Steel Gate Valve is a high-performance solution designed for critical isolation tasks in applications requiring zero leakage and high reliability. Featuring a forged steel body and a bellows seal, it ensures exceptional sealing performance in high-pressure, high-temperature, and hazardous environments. This valve is strictly for on/off service and not suitable for throttling.

Applications

Oil & Gas: Wellhead isolation, pipeline shut-off, and refinery applications.
Petrochemical: High-pressure fluid control in chemical reactors and distillation units.
Power Generation: Steam isolation in turbines and boiler feedwater systems.
Nuclear: Primary and secondary circuit isolation in nuclear power plants.

Key Features

Forged Construction

  • Material Integrity: Forged A105, F22, or F316 steel for enhanced grain structure and impact resistance.
  • Pressure Capacity: ANSI Class 1500–2500 (PN260–PN420).
  • Temperature Range: -29°C to 593°C (-20°F to 1100°F).

Bellows Seal Design

  • Zero Leakage: Metal bellows provide hermetic sealing, eliminating stem leakage.
  • Durability: Bellows made of 316L stainless steel for long service life.
  • Maintenance-Free: No stem packing required, reducing maintenance costs.

Gate Design

  • Wedge Type: Flexible or solid wedge for zero leakage (ANSI Class VI).
  • Fire-Safe: API 607 certified with secondary metal-to-metal sealing.
  • Stem Design: Rising stem (OS&Y) or non-rising stem (NRS) options.

Sealing & Operation

  • Seat Materials: Stellite 6 overlay, 13% Cr stainless steel.
  • Operation: Manual handwheel, gear operator, or actuator compatibility.

Comparison with Packed Stem Valves

FeatureBellows Type Gate ValvePacked Stem Gate Valve
Stem SealingMetal bellows (zero leakage)Graphite/PTFE packing (potential leaks)
MaintenanceMaintenance-free (no packing)Requires periodic packing replacement
CostHigher initial investmentLower upfront cost
ApplicationHazardous/zero-leakage environmentsGeneral industrial use

使用介质

Liquefied gas, Natural gas, petroleum, steam

使用工况

chemical plant, High temperature and high pressure, High temperature and high pressure, High temperature and high pressure steam system, Petrochemical industry, power plant

总结

The Bellows Type Forged Steel Gate Valve delivers unmatched reliability in high-pressure, high-temperature isolation applications. Its robust forged construction and API 600 compliance make it the gold standard for critical systems in oil and gas, power plants, and chemical processing. Not designed for flow regulation.

Product Parameters

Nominal DiameterDN15–DN50 (½"–2")
Pressure RatingANSI Class 1500–2500 (PN260–PN420)
Temperature Range-29°C to 593°C (-20°F to 1100°F)
Body MaterialASTM A105 (Carbon Steel), F22 (Chrome-Moly), F316 (Stainless Steel)
Gate Material13% Cr, Stellite 6, or F6a
Stem MaterialSS410, SS304, or Monel
Bellows Material316L Stainless Steel
Connection TypesFlanged (ASME B16.5), Socket Weld (SW),
Seat Leakage ClassANSI Class VI (standard)
CertificationsAPI 600, ASME B16.34, ISO 9001, PED 2014/68/EU
Testing StandardsHydrostatic: API 598; Fire-Safe: API 607

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