Onn Self Production Wj41h Bb-Bg-OS& Y Manual Bellows Globe Valve for Petroleum Use

• 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 Onn Self Production Wj41h BB-BG-OS&Y Manual Bellows Globe Valve lies its most crucial element, the metal bellows. Meticulously designed, the lower end is seamlessly welded to the valve stem assembly, while the upper end is precisely welded to the connecting plate. This forms an impenetrable metal barrier between the fluid medium and the atmosphere, guaranteeing absolute zero leakage of the valve stem.
2. The valve disc features a sophisticated conical design, complemented by a sealing surface that aligns perfectly with the medium. This innovation ensures superior sealing performance and extends the valve's operational lifespan significantly.
3. Our dual sealing design (bellows+packing) serves as an advanced safety measure. In the unlikely event of bellows failure, the valve stem packing acts as a secondary seal, preventing leakage and meeting rigorous international sealing standards.
4. Unlike conventional methods that only lubricate threads, our valve cover includes an integrated grease fitting. This allows for direct lubrication of the valve stem, nut, and shaft sleeve, enhancing operational efficiency and longevity.
5. The ergonomic design of our handwheel ensures easy and safe operation, offering a more convenient user experience and a longer service life, making it a reliable choice for various applications.

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

Onn Valve Co., Ltd. is dedicated to providing comprehensive after-sales support. Our services include routine valve maintenance and training for troubleshooting common issues. We offer remote and on-site technical guidance for valve review, installation, and operation. Our commitment to excellence ensures that all technical quality consultations are addressed within 24 hours. We provide an 18-month product warranty (aligned with national standards) and a 24-hour technical support hotline. During the warranty period, we supply various after-sale services free of charge, including a limited supply of free wearing parts for 18 months. Beyond this, we offer lifetime after-sale service, ensuring our customers receive ongoing support.

FAQ

Q1: What is a safety valve?
1. Safety valves play a critical role in protecting life, property, and the environment. They are engineered to open and relieve overpressure in containers or devices, then re-close to prevent further fluid release once conditions return to normal.
2. Serving as a crucial safety device, the safety valve is often the last line of defense. It is imperative that the safety valve operates reliably under all conditions. Safety valves are distinct from process valves or pressure regulators and must be used solely for overpressure protection.

Q2: How does a safety valve work?
The working principle of a safety valve is as follows:
1. Open: When the system pressure surpasses the safety valve's set pressure, the valve disc opens due to the combined force of medium pressure and spring force, thereby releasing excess pressure.
2. Keep Open: As the system pressure stabilizes within the set limits, the spring maintains stability, keeping the safety valve open under controlled conditions.
3. Close: When the system pressure falls below the valve's set pressure, the spring can no longer keep the valve open. The valve disc then closes under the medium pressure, halting any further pressure increase.