Steam Jacketed Safety Valve, API 526, A351 CF8, DN50, PN16

Name: Steam Jacketed Safety Valve, API 526, A351 CF8, DN50, PN16
SKU: KV-20250219-SV-01
Availability: InStock
Rating: 5 (1 reviews)

Key Specifications / Features

The Steam Jacketed Safety Valve, designed with balanced bellows and built to API 526 standards, features a stainless steel ASTM A351 CF8 body for strength and corrosion resistance. With a 2-inch (DN50) size, it supports PN16 and Class 150 LB pressure ratings, and comes with RF flanged ends for easy installation. Ideal for steam applications, this safety valve ensures reliable pressure relief, maintaining system integrity and safety under high-pressure conditions.

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Detail Information

Product Name: Steam Jacketed Balanced Bellows Safety Valve
Design Standard: API 526
Body Material: ASTM A351 CF8
Size: DN50, 2 Inch
Pressure: PN16, Class 150 LB
End Connection: RF Flanged

The Safety Valve is specifically designed for use in polyester, ethylene, urea, and other industrial processes. This safety valve is equipped with an Insulation Jacket and a steam purge joint to ensure safe and reliable operation of the system.
The discharge area of the safety valve is calculated based on the cylindrical or conical surface formed between the valve disc and the valve seat. This design makes it particularly suitable for applications with small discharge capacities, large back pressures, and stable system pressures. The Safety Valve provides a reliable solution for maintaining system safety and efficiency in demanding industrial environments.

Technical Specifications

» Normal Size Range: 1/2-12 Inch (DN15-DN300)
» Normal Pressure Rating: Class 150-300 LB (PN10-PN40)
» Materials: Carbon Steel, Stainless Steel, Alloy Steel, Duplex, or Other Specials
» Design and Manufacture: GB/T 12243-1989, API RP 520, 521, API 526, API 527
» Face to Face (End to End): GB/T 14087, JB/T 6441, JB/T 2203, JB/T 9624, JB/T 53170
» Flanged Connection: ASME B16.5, DIN 2543 to 2545, EN 12627
» Test and Inspection: API 598, DIN 3230, MSS SP-117
» Ends Connections: RF Flange
» Working medium: used for polyester, ethylene, urea

Main Parts and Materials

No	Name of Parts	Carbon steel	Stainless steel	Stainless steel
1	Body	A216 WCB	A351 CF8	A351 CF8M
2	Nozzle	SS 304	SS 304	SS 316
3	Adjusting Ring	SS 304	SS 304	SS 316
4	Disc	SS 304	SS 304	SS 316
5	Disc Holder	SS 304	SS 304	SS 304
6	Bellows	SS 316L	SS 316L	SS 316L
7	Guide Sleeve	50CrVA	50CrVA	50CrVA
8	Bonnet	ZG230-450	SS 304	SS 316
9	Spring	50CrVA	50CrVA+Coated Teflon
10	Stem	2Cr13	SS 304	SS 316
11	Cap	ZG230-450	SS 304	SS 316
12	Sealing surface	Overlay STL	Overlay STL	Overlay STL

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FAQs

What is valve stem packing and its role in industrial valves?

Valve stem packing is a critical sealing component installed around the valve stem inside the bonnet area. Its primary function is to prevent internal media (gas or liquid) from leaking to the external environment while still allowing smooth linear or rotary movement of the stem.

In industrial applications such as oil & gas, petrochemical, and power generation, packing acts as a dynamic seal that must withstand continuous friction, pressure fluctuations, and thermal cycling. Unlike static seals, packing is constantly in contact with a moving component, making material selection and compression design extremely important.

High-performance packing systems are often designed to meet low-emission requirements such as API 622 and ISO 15848-1, ensuring fugitive emissions remain within strict environmental limits.

What Are Rising Stem & Non-Rising Stem Gate Valves?

What is a Non-Rising Stem Gate Valve?

A valve where the stem does not move vertically but rotates internally to raise or lower the gate. This design is ideal for installations with limited vertical space.

How Does a Non-Rising Stem Gate Valve Work?

The handwheel turns the stem, which in turn moves the gate up or down inside the valve body without changing the external height of the stem.

How Does a Rising Stem Gate Valve Work?

The handwheel lifts the stem and gate together, providing a visual indication of whether the valve is open or closed.

Which Valve Should I Choose?

Use a rising stem valve for above-ground applications where visibility and ease of maintenance are important.

Use a non-rising stem valve for underground or space-limited installations.

Conclusion

The choice between rising stem and non-rising stem gate valves depends on your specific application needs. For clear valve status indication and easy maintenance, go with a rising stem valve. For compact installations, a non-rising stem valve is the better option.