Vacuum Safety Valves-SHENGAO VALVE GROUP CO.,LTD

Why Choose Us?

ShenGao's Vacuum Safety Valves

In many cases, manual steam valves used to use stuffed globe valves. Such valves have poor sealing performance, inflexible opening and closing, and short service life during use. Soon after the packing was replaced, steam leaked again, which affected the working environment and wasted a lot of steam. Choosing a Shengao bellows globe valve will solve all these problems.

Key Components of Vacuum Safety Valves

The bellows globe valve mainly consists of the following six parts. This component ensures that the globe valve remains efficient and stable during operation and maintains a zero leakage record.

Valve Body

Channels the fluid's path.
Disc
Stem
Bellows
Actuator
Metal Seals
Bonnet

Advantages of Vacuum Safety Valves

01

Strong high-pressure resistance

The special metal bellows design gives the valve overall high strength and rigidity. This allows the bellows globe valve to withstand many extreme conditions such as high pressure, high temperature and external impact.
02

High-temperature working conditions

Corrugated pipes have good elasticity and deformability. This allows the valve to adapt well to thermal expansion, contraction, vibration and other deformations.
03

Zero leakage design

The bellows is connected to the valve stem through welding, which can form a double seal with the packing, truly achieving zero leakage.
04

Reduce maintenance costs

There is no need to replace the filler frequently, and no additional material and labor costs will be incurred.
05

Stable system operation

When replacing the packing of the traditional packing stop valve, the operation of the production line needs to be suspended, thereby causing losses, but the bellows stop valve does not need to replace the packing.

Why Choose
Vacuum Safety Valves？

The bellows seal globe valve has many advantages. The bellows globe valve is a new type of globe valve. The stem seal is a double seal design of bellows + packing. The sealing performance is more reliable than ordinary globe valves. The metal barrier formed by the bellows can prevent leakage, and the filler can also provide a sealing effect after the bellows fails. The application is safer, energy-saving, environmentally friendly, and has zero leakage. Meets international sealing standards. In addition, it can work in many extreme situations.

About Shengao Vacuum Safety Valves

Valve Body Type :	Globe
Valve Body Material :	When the valve body material is ordinary carbon steel, the valve disc material is usually CR13 series martensitic stainless steel (American Standard 410 and 420 stainless steel) or higher grade alloy. When the valve body material is stainless steel, the valve disc material is usually made of austenitic stainless steel (American standard SS304, SS316) that is not lower than the valve body material or a higher grade corrosion-resistant alloy material (Hastelloy, Monel) , Inconel alloy) etc.
Valve Stem Material :	Valve stem material is basically the same as the valve disc, unless there are special requirements.
Seat Sealing Surface Material :	Cladding stainless steel and cladding hard alloy (STL)
Bellows Material :	Corrosion-resistant alloy materials such as Inconel and stainless steel, etc., ensure a tight seal and prevent leakage along the valve stem
Pressure level :	Class 150-2500 (ASME standards) or PN10~PN420
Actuator :	Manual handwheel, Electric actuator, Pneumatic actuator
Temperature :	Depends on the material used, but typically bellows can operate in a temperature range of -50°C to +400°C, although specific materials may alter this range.
Size:	1/2'' to 24'' (DN 15-600)