Name of Parts

Material

Advantages/Disadvantages

Valve Body

Bronze

Bronze has good corrosion resistance, wear resistance, castability and excellent mechanical properties

Brass

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

Cast Iron

The carbon content of cast iron is relatively high, and its performance is relatively brittle; the tensile performance is relatively poor; the casting performance is relatively good, and the casting method can be used to process parts with relatively complex shapes

Valve Bonnet

Bronze

Seawater corrosion resistance, a little more expensive than cast steel and cast iron

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 simple production equipment, simple smelting process, low price, and has a series of performance characteristics such as excellent casting performance, machinability, friction reduction and vibration reduction.

Valve Disc

Bronze

Bronze has excellent low temperature resistance, the price is a little more expensive than stainless steel, and the seawater resistance of bronze is better than that of stainless steel

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

Cast Iron

Although the strength, plasticity and toughness of cast iron are poor, it can not be forged, but it has excellent casting, antifriction, machinability and other performance characteristics

Valve Stem

Brass

It has high strength, toughness, good anti-friction properties, high corrosion resistance in the atmosphere and sea water, but has a tendency to corrosion cracking, and has good plasticity in hot state

Stainless Steel

Stainless steel has a series of characteristics such as excellent corrosion resistance, formability, compatibility and toughness in a wide temperature range

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

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

Cut corners, the wall thickness of the valve body is not processed according to the standard

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

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

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

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

The performance of the substitute material is unstable, resulting in a decrease in the quality of the valve.

Strictly select materials according to user requirements

High safety factor, reasonable structure, long product life

Product name

Globe valve

Standard

JIS

Medium

Air, gas, oil,etc.

Brand name

Customer required

Application

Shipbuilding,ship repair

OEM service

Available

Certificate

ABS, BV, CCS, LR, RINA

Model

7333B 7334B