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. more expensive than brass

Brass

Brass has good strength and hardness, and also has good machinability, which is convenient for industrial cutting and grinding.

Cast Iron

Cast iron is the raw material for steelmaking. Steel is made from pig iron. It has high mechanical strength and toughness, and also has special properties such as heat resistance, corrosion resistance and wear resistance.

Valve Bonnet

Bronze

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

Brass

Brass is the cheapest, with high strength, hardness and poor plasticity, but it can still withstand pressure processing well in hot state, and its corrosion resistance is average.

Cast Iron

Cast iron has good wear resistance, high vibration damping, low notch sensitivity and excellent machinability

Valve Disc

Bronze

The melting point of bronze is relatively low, so it has good plasticity, and bronze also has good luster, good hardness and wear resistance

Brass

Good mechanical properties, good plasticity in hot state, good plasticity in cold state, good machinability, easy fiber welding and welding, corrosion resistance, but easy to produce corrosion cracking, and cheap

Cast Iron

Low production cost; good casting performance, low melting point; good fluidity; high wear resistance and wear resistance, excellent vibration damping and low notch sensitivity; low mechanical properties such as tensile strength, plasticity, and toughness

Gasket

Non-asbestos

It has very good water tightness, air tightness, and fuel tightness, good mechanical properties, oil resistance, temperature resistance, and pressure resistance.

Comparison

Product Picture of other low quality supplier

Product Picture of our factory

Other low quality supplier

Consequence

Our Factory

Result

Use ordinary round steel stem instead of stainless steel stem

The performance of the substitute material is unstable, the ordinary round steel is processed, the valve stem is thin and there is no heat treatment, which leads to the deterioration of the valve quality.

Made of stainless steel, the diameter of the valve stem meets the design requirements, and it has undergone high temperature quenching and tempering heat treatment.

High safety factor, reasonable structure, long product life

In order to reduce cost, bronze valve core is replaced with cast iron valve core,

Cast iron valve core is easy to corrode and break

Strictly select materials according to user requirements

High safety factor and reasonable structure

The manufacturer considers the cost and purchases unqualified standard bolts

Leaving hidden dangers on the valve results in an accident.

According to customer requirements, use standard bolts.

Use it with confidence, reduce safety hazards and reduce the accident rate.

Use iron and carbon steel to manufacture valves and repair waste valves to pretend to be good valve products.

Such products generally have large errors in hardness and accuracy. It is easy to cause the shell to crack, and the phenomenon of running, running, dripping and leaking occurs, and in severe cases, it will cause the explosion of the oil and gas pipelines.

Manufacture new valves in strict accordance with customer material requirements, never impersonate

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

Jerry-build, the wall thickness of the valve body is not processed according to the standard

The thickness is uneven, the valve body is easy to be damaged, and the service life is short.

Strictly follow the standard processing to ensure uniform thickness

Use with confidence, meet user needs, and the product has a long service life

Product Pressure

5K, 10K

Standard

JIS

Medium

Air, gas, oil,etc.

Nominal Diameter

15-80, 50-200

Brand name

Customer required

Material

Bronze, cast iron

Application

Shipbuilding,ship repair

OEM service

Available

Certificate

ABS, BV, CCS, LR, RINA