Manual Bellows Globe Valve Wj41h Onn Series for Chemical and Pharmaceutical Industries

• Media: Oil
• Standard: En 12516
• Certification: CCC, ISO, CE
• Temperature: High Temperature
• Connection: Flange
• Pressure: Adjustable
• Model NO.: WJ41H forged steel corrugated pipe globe valve
• Closed: Open
• Structure: Metal Corrugated Pipe
• Material: Forged Steel
• Suitable Temperature: -196ºC-600ºC
• Application: Petroleum, Chemical, Pharmaceutical, Fertilization
• Product Structure: Manual Drive, Flange Connection
• Color: Customizable
• Mafnufacture License: Tsf733049-2027
• Transport Package: Plywood Case
• Specification: DN15-DN400
• Trademark: ONN
• Origin: Wenzhou, Zhejiang, China
• HS Code: 8481400000
• Production Capacity: 48000PCS/Year

Product Description

Product Description

1. At the heart of the bellows sealed globe valve lies the robust metal bellows. The lower end is expertly welded to the valve stem assembly, while the upper end is seamlessly fused to the connecting plate. This creates an impenetrable metal barrier between the fluid medium and the atmosphere, ensuring absolute zero leakage of the valve stem.
2. The valve disc features an innovative conical design, with a streamlined sealing surface that aligns perfectly with the medium. This design enhancement dramatically improves sealing performance and extends the valve's service life.
3. Dual Sealing Technology (bellows + packing): Should the bellows ever fail, the valve stem packing is there as a second line of defense to prevent leakage, adhering to stringent international sealing standards.
4. The valve cover is equipped with a grease fitting, enabling direct lubrication of the valve stem, nut, and shaft sleeve. Unlike conventional methods that only grease the threads, this ensures comprehensive lubrication.
5. Ergonomically designed handwheel: This user-friendly handwheel not only ensures a longer service life but also facilitates easy and convenient operation, providing enhanced safety and reliability.

Product Parameters

Number	Name	Material Quality	Number	Name	Material Quality
1	Valve body	GS-C25,CF8,CF8M	9	Hex Nut	ASTM A194-2H,A194-8
2	Valve flap	13Cr,SS304,SS316,Stellite	10	Double headed bolt	ASTM A193-B7,A194-B8
3	Pin	13Cr,F304+Stellite	11	Filler	Flexible graphite, PTFE
4	Bellows assembly	SS304,SS316	12	Gland	1025,SS304,SS316
5	Valve stem	SS304,SS316	13	Positioning piece	1025,SS304
6	Shim	20Cr13,F304,F316	14	Valve Nut	Copper alloy, D2, BL-2
7	Bonnet	Flexible graphite+stainless steel, PTFE	15	Handwheel	Carbon steel

Detailed Photos

After Sales Service

Our company offers comprehensive valve maintenance and troubleshooting training services. We provide remote or onsite valve inspections, installation, and operational technical guidance. Our technical quality consultations are answered within 24 hours, and we offer an 18-month product warranty (as per national standards). Enjoy 24-hour technical support via our hotline. We offer various after-sales services free of charge during the warranty period, including lifetime service and limited free supply of wearing parts for 18 months.

FAQ

Q1: What is a safety valve?
1. Safety valves are crucial for protecting life, property, and the environment. These valves are engineered to open and release excess pressure from a container or device and to re-close, preventing additional fluid release once normal conditions are restored.
2. A safety valve is often the last line of defense, essential for operational safety under all conditions. Unlike process valves or pressure regulators, safety valves are not to be misused. Their sole function is overpressure protection.

Q2: How does a safety valve work?
The operational principle of a safety valve can be summarized as follows:
1. Opening: When the system pressure surpasses the valve's set pressure, the valve disc is pushed open by the medium pressure and spring force, allowing pressure release.
2. Maintain Open: As long as the system pressure remains within the set threshold, the spring remains stabilized, keeping the safety valve open and the system under controlled pressure.
3. Closing: When the system pressure drops below the set pressure, the spring action can no longer maintain the open position. The valve disc closes, halting further pressure increase.