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  • Updated:2018-01-18
Product Description
COMPANY PROFILE
1500LB/2500LB Flanged High Pressure Forged Steel trunnion mounted ball valve
High Pressure Forged Steel trunnion mounted ball valve series. It has fire-proof and antistatic design .No-direction limit for installing ,wide usage, reasonable price, easy operation
Characteristics of API Ball Valve
1. Design and manufacture of ptoduct according to American state standard ANSI B16.34, American petroleum institute standard API608 API6D.
2. Liquid resistance smallest of all type of valve.
3. Open quickly, only turn on 90 degree may finilsh open and close.
4. Seat material use teflon or R-teflon, low friction, seal reliable open and close lightly.
5. Movement of ball on the middle of valve seat has wipe function so may suit medium of suspending granule.
6. Stem use back seal and hyperbatic structre which may prevent medium to striking stem on the condition of pressure.
7. According to the need of consumer, may design for anti-static electricity, fireproop and use a locker to prevent wrong operator.
8. Body of ball can be floated or fixed accordance with the of strength of opening and closing. Seat of fixed ball valve floatablerealize seal purpose depend on piston effect of medium pressure so to lighten the strength of open and close.
STD (Fire -Droof,electicity Protect)
Type Desing And Manufacture

Face to face /End to end

Flange Dimension

Pressure and Temperature

lnspection and test

Split flange ball valve
Fixed flange valver
BS5351 API6D

ASME B16.10

ASME B16.5

ASME B16.34

API598
API6D

Seat/Seal Material

Material

Description

Typical temp range

 
PTFE (Teflon)

A very commonly used seat material. PTFE is a synthetic fluoropolymer an excellence material for valve seat due to its low friction, high chemical resistance (literally all chemical) & good temperature resistance. PTFE is vulnerable to Explosion Decompression (ED), it will expand violently and exploded (damage) when the high pressure is being remove rapidly. Hence PTFE is normally suitable for valve up to certain pressure class like class 150 - class 300.

 
-45°C to 232 °C

 
Reinforce PTFE

Reinforced version of PTFE with glass or carbon added into the virgin PTFE has increases the wear resistance and deformation under high pressure. Typically in 15% or 25% glass/carbon R- PTFE having similar chemical resistance to virgin PTFE. The added glass in R-PTFE will re-act to  hydrofluroic acid and hot spring caustics, hence it's not suitable to use with these chemicals.

 
-100°C to 220 °C

PEEK  

 

PEEK (Polyether Ether Ketone) a high performance engineered thermoplastic it is consider to be a premium great material for valve seat. It offers great resistance to water and chemical, ability to continuously expose to hot water / steam. Suitable for temperature range from -56°C to 315°C. PEEK is suitable for high pressure application and corrosive service. For valve industry, it is normally being used for offshore oil & gas upstream sector. Due to PEEK rigid characteristic it increase the operation torque of the valve that uses PEEK seat. PEEK can be used from medical implants to nuclear service.

 
-56°C to 315°C
 

Devlon

Devlon is considerably one of the toughest thermoplastic with excellence wear resistance and suitable for high pressure application in the market. It's produced by using the Spin casting / centrifugal casting method to achieve the higher material density that gives the material its characteristic. Devlon V-API is the Devlon grade that is commonly used as seat material for valve. This material has low moisture absorption rate that give its dimensional stability. Commonly used in the oil & gas offshore application that demand resistance to high pressure, corrosion and wear. Suitable for valve pressure from 300 to 1500.

 
-100°C  to +150 °C

 
EPDM
 

EPDM - ethylene-propylene diene monomer has good scratch and tear resistance. Offers good chemical resistance to variety of acid and alkaline. Subject to attack by oil, hence it's not suitable for oil application like petroleum, hydrocarbon, strong acid/alkaline. Not recommended for compressed air.

-29°C to 107°C
 

 
Viton
 
 

Viton a flurocarbon elastomer that are intrinsically compatible with a wide variety of chemicals. Because of its good chemical resistance, Viton are widely used in services like hydrocarbon, concentrated  mineral acids and petroleum oil. However it's not suitable for steam or hot water service.

 
-17°C to 149°C
 

Buna-N

Buna-N (Nitrile rubber) is a synthetic rubber copolymer that has good resistance to oil, water & acid. It has good compression, scratch resistance and tensile strength. Buna-N is relatively not affected in services that is paraffin base like fatty acid, alcohols & oil. Not suitable for Nitric Acid and strong oxidizer service.

 
17°C to 121°C
 

Delrin

Polyoxymethylene engineered thermoplastic manufactured by various manufacturer with different trade name and Delrin (Dupont) is more commonly used in valve application. It has high stiffness, low friction, excellent dimensional stability, low moisture absorption, high fatigue endurance, superior impact resistance. Commercially it is being use in many high performance component like ball bearing, ski binding, fastener, automotive and electronics products. Delrin has good resistance to cold flow, ideal for pressure up to 5500psi (depend on the size) Can withstands nuclear radiation at doses of up to 106 rads. Do not use on oxygen service, or steam. to 5500psi (depend on the size) Can withstands nuclear radiation at doses of up to 106 rads. Do not use on oxygen service, or steam.

-40°C to 150°C
 
 

Metal Seat Metal seat are used for valve in high abrasive, high temperature, high  pressure or corrosive service. The seat and ball are coated using the various  metal coating methods listed below to increase the metal surface hardness,  wear resistance, corrosion resistance, fatigue strength and reduce friction.  Metal seated valve can take temperature upto 800 deg C or more. The sealing  face of the ball are lapped repeatedly to achieve tight seal, once lapped the  sealing face will typical unique to each other.
 Metal Coating Method
Low Temperature Plasma Nitriding
Salt-bath Nitriding
Chromium Carbide
Tungsten Carbide
Stellite
 
-200°C to 800°C

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