Name of Parts

Material

Advantages/Disadvantages

Valve Body

Bronze

Bronze has good casting, friction reduction and mechanical properties

Brass

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

Valve Disc

Bronze

Bronze has excellent low temperature resistance and is a little more expensive than stainless steel.

Stainless Steel 304

Good corrosion resistance, heat resistance, low temperature strength and mechanical properties; Stamping, bending and other thermal processing, no heat treatment hardening phenomenon (no magnetic, then use temperature -196℃ ~ 800℃)

Stainless Steel 316

Its corrosion resistance, atmospheric corrosion resistance and high temperature strength is particularly good, can be used in harsh conditions; Excellent work hardening (no magnetic).

Valve Stem

Stainless Steel 304

Good processing performance, high toughness, high density, polishing without bubbles, acid and alkali resistance

Stainless Steel 316

The corrosion resistance, atmospheric corrosion resistance and high temperature strength of 316 stainless steel are better

Brass

It has the advantages of high strength, toughness, good antifriction, high corrosion resistance in the atmosphere and sea water, but it has the tendency of corrosion and rupture

Valve Seat

Bronze

Anti-corrosion，it’s expensive than cast steel and cast iron.

Cast Iron

Not resistant to corrosion,cost less than bronze and cast steel

Hand Wheel

Cast Iron

Cost less than bronze and cast steel

Comparison

Product Picture of other low quality supplier

Product Picture of our factory

Other low quality supplier

Consequence

Our Factory

Consequence

In order to reduce costs, omit raw materials and reduce internal quality, resulting in the thin wall of the valve body that occupies the main body of the valve.

Leaving a safety hazard, the thin wall is easy to break or leak the valve at high temperature and high pressure or during operation.

Strictly in accordance with the standard processing, uniform thickness, and material

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

Poor manufacturing quality of valve cover, uneven thickness, uneven material

Bonnets are prone to breakage, blisters, corrosion or aging problems

Strictly in accordance with the standard processing, uniform thickness, and material

The quality of the valve cover is good, it is not easy to generate air holes, and the product has a long service life.

Refurbished valves, some operators sell the waste valves for the second time after repainting, which brings serious safety hazards to the quality of the project

Refurbished valves are easy to cause the shell to crack, and the phenomenon of running, running, dripping and leaking occurs, and in severe cases, the oil and gas pipelines will explode.

According to customer requirements to manufacture new valves, never shoddy.

Meet the hardness and precision requirements of standard valves,

Ensure the quality of the valve and ensure the normal operation of the equipment.

The quality of flange manufacturing is poor, and there are problems such as cracks, pores, and insufficient thickness

the valve is not wear-resistant, the pressure bearing is poor, the valve is prone to quality problems, and the service life is short.

Select materials in strict accordance with national standards

The valve is wear-resistant, has good pressure-bearing performance, and is not easy to be damaged.

Replace the copper stem with an iron-copper-plated stem

Replace the copper stem with an iron-copper-plated stem

Strictly select materials according to user requirements

High safety factor, reasonable structure, long product life

Product Pressure

5K, 10K, 16K

Standard

JIS

Medium

Air, gas, oil,etc.

Nominal Diameter

15-40

Brand name

Customer required

Material

Bronze

Application

Shipbuilding,ship repair

OEM service

Available

Certificate

ABS, BV, CCS, LR, RINA