Name of Parts

Material

Advantages/Disadvantages

Valve Body

Bronze

Bronze has the characteristics of low melting point, high hardness, strong plasticity, wear resistance, corrosion resistance, bright color, etc.

Cast iron

The tensile strength, ductility and toughness of cast iron are lower than those of carbon steel. Lower price than bronze and stainless steel

Carbon Steel

Low strength, low hardness, good plasticity and good weldability.

Stainless Steel

High corrosion resistance makes it usable in harsh environments. It is fire and heat resistant, resists scaling and maintains strength at high temperatures.

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.

Aluminum Bronze

It has high strength and good wear resistance. It is used for high-strength screws, nuts, copper sleeves, sealing rings, etc., and wear-resistant parts. The most prominent feature is its good wear resistance.

Valve Seat

NBR

Applicable medium 0-80℃ oil class

EPDM

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

PTFE

Applicable to corrosive media below 200℃

Hard alloy

Suitable for high temperature and high pressure environment

Valve Stem

Stainless Steel

Key advantages include its high corrosion resistance, making it usable in harsh environments. It is fire and heat resistant, resists scaling and maintains strength at high temperatures.

Handle

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