Bellows type forged steel gate valve

Wedge gate valve is a high-performance valve widely used in petroleum, chemical, electric power, metallurgy, water supply and drainage and municipal engineering and other working conditions. The valve is suitable for water, steam, oil, gas and a variety of corrosive media, with excellent pressure resistance, high temperature resistance and sealing performance. The wedge gate valve adopts wedge gate design, which can realize two-way sealing, and the gate plate closely fits the valve seat when the valve is closed, ensuring no leakage. Product features include sturdy structure, flexible opening and closing, reliable sealing, small flow resistance, suitable for fully open or fully closed conditions. The wedge gate valve supports manual, electric and pneumatic drive methods to meet the needs of automation control. Its main function is to realize the cut-off and connection of pipeline media, to ensure the safe and stable operation of the system. With excellent durability and sealing performance, wedge gate valves have become an indispensable high-quality valve equipment in industrial processes and critical piping systems.

fig. beginning

products

Bellows type forged steel gate valve

Model: WZ41Y

Subtitle：Zero leakage gate valve

Tags:high pressure valve

Classification:Wedge Gate Valves, Forged Steel Gate Valves

Working conditions:chemical plant, power plants, petrochemical industry, high temperature and pressure

Product Overview

Bellows-type forged steel gate valve is a high-performance gate valve, which is widely used in piping systems under high-pressure and high-temperature working conditions in petroleum, natural gas, chemical industry, electric power and so on. The valve is suitable for water, steam, oil, natural gas and other media, with excellent high temperature, corrosion and high pressure resistance. The bellows seal design replaces the traditional packing seal, which can effectively prevent media leakage and avoid packing leakage problems, improving the reliability and safety of the valve. Its forged steel material has excellent mechanical properties and can withstand high working pressure and shock load. Product advantages include flexible opening and closing, strong sealing, good durability, low flow resistance and easy maintenance. Bellows type forged steel gate valve is suitable for fully open or fully closed operation of pipeline, with excellent sealing performance and fluid control ability. The valve is widely used in industrial piping systems that require tight sealing and high reliability, which can effectively ensure the safe operation of the system and prevent leakage and failure. Its excellent performance makes it an indispensable and important equipment in high-pressure piping systems.

Applicable working conditions

Oil and gas: wellhead isolation, pipeline shutdown 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 energy: Isolation of primary and secondary circuits in nuclear power plants.

Main features

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

Bellows seal design
Zero Leakage: Metal bellows provides an airtight seal, eliminating stem leakage.
DURABILITY: Bellows are made of 316L stainless steel for long 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 Resistant: API 607 certified with secondary metal-to-metal seal.
Stem design: Open stem (OS&Y) or concealed stem (NRS) available.

Sealing and Handling
Seat material: Stellite 6 alloy overlay, 13% chrome stainless steel.
Operation: Manual handwheel, gear-operated mechanism or actuator compatible.

Comparison with Packed Stem Valves

hallmark	Bellows Gate Valves	Stuffing Stem Gate Valves
Stem seals	Metal bellows (zero leakage)	Graphite/PTFE packing (risk of leakage)
safeguard	no maintenance	Requires periodic replacement of packing
(manufacturing, production etc) costs	Higher initial investment	Lower upfront costs
Applicable working conditions	Hazardous/zero leakage environments	General industrial use

Medium of use

petroleum, Liquefied Natural Gas (LNG), vapor

working condition

chemical plant, power plants, petrochemical industry, high temperature and pressure, High-temperature and high-pressure working conditions, High Temperature High Pressure Steam System

summarize

Bellows-type forged steel gate valves offer unmatched reliability in high-pressure, high-temperature isolation applications. Its rugged forged construction and API 600 compliance make it the gold standard for critical systems in the oil and gas, power plant and chemical industries. Not suitable for flow regulation.

Product Parameters

Nominal diameter	DN15-DN50 (½"-2")
Nominal pressure	ANSI Class 1500-2500 (PN260-PN420)
Applicable temperature	-29°C to 593°C (-20°F to 1100°F)
Valve Material	ASTM A105 (carbon steel), F22 (chromium-molybdenum steel), F316 (stainless steel)
Gate Material	13% Cr, Stellite 6, or F6a
Stem Material	SS410, SS304, or Monel
corrugated material	316L Stainless Steel
connection method	Flange Connection (ASME B16.5), Socket Weld (SW),
Seat Leakage Rating	ANSI Class VI (standard)
Test Standards	Hydrostatic pressure: API 598; Fire protection: API 607