Name of Parts

Material

Advantages/Disadvantages

Valve Body

Bronze

Pressure resistance, wear resistance, and toughness are higher than those of brass. Bronze has a certain delay in the rusting time of the valve. The price is higher than brass

Brass

Brass has low pressure resistance and is easy to rust. The price is lower than bronze.

Valve Disc

Stainless Steel

Stainless steel has a strong ability to resist tension, wear and corrosion. Stainless steel is much stronger than copper in material. Stainless steel will not produce corrosion, pitting, rust or wear and high temperature resistance.

Bronze

Bronze has excellent low temperature resistance, good corrosion resistance, wear resistance, casting and excellent mechanical properties

Valve Seat

NBR

Applicable medium 0-80℃ oil class

PTFE

Applicable to corrosive media below 200℃

EPDM

Suitable medium -20-120℃ water, steam, etc

Hard alloy

Suitable for high temperature and high pressure environment

Handle

Bronze

It has good high temperature corrosion resistance and oxidation resistance. It has good corrosion resistance in the atmosphere, fresh water and sea water, and the machinability is acceptable. It can be welded and not easy to braze.

Cast Iron

Cost less than bronze

Comparison

Product Picture of other low quality supplier

Product Picture of our factory

Other low quality supplier

Consequence

Our Factory

Result

Jerry-built, the valve body wall thickness does not follow the standard processing

Uneven thickness and material, it’s easy to damage the valve body.

Strictly in accordance with the standard processing

Customer use rest assured, to meet user needs, the product has long service life.

Use recovered waste valves as good valves.

It is easy to cause the shell to crack, and in severe cases, the oil and gas pipelines will explode.

Strictly in accordance with customer material requirements to manufacture new valves.

Meet the hardness and precision requirements of standard valves,
Ensure the valve quality, ensure the normal operation of equipment.

Flange manufacturing quality is poor, there are cracks, pores, thickness is not enough and other problems

Lead to poor wear resistance of the valve, the valve is prone to quality problems, short service life.

Material selection in strict accordance with national standards

Valve wear resistance, pressure performance is good, not easy to damage

Bronze valve disc was replaced with cast iron valve disc in order to reduce costs.

Cast iron valve disc is prone to corrosion and damage

Material selection in strict accordance with national standards

High safety factor, reasonable structure