Reduced Valve Sleeve

Reduced port sleeves are used in control applications where material flow needs to be slowed down as it passes through the valve. These sleeves also make the valve easier to close by reducing port size at the pinching area.

Material Selection - Selecting the correct elastomer material for the chemical composition of the process fluid is essential for optimum service life.

In many cases, process fluids will contain a variety of chemicals, and the elastomer selection should take into consideration all chemicals present.

Our chemical recommendations are based upon field experience, our polymer suppliers and laboratory tests. This information is offered only as a guide.


  • Technical Parameter
  • Advantage Characteristics
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Size range:

15~2000mm  1/2~80in

Pressure grade:

1~10Mpa 1:2 safety factor, which means bursting pressure is 2 times higher than the operating pressure.

Analysis of construction:

Inner Layer: adopt various kinds of rubber materials or formulas in order to fit for the high demanding applications involving abrasion, corrosion or high temperature, etc.

Reinforced layer: the perfect combination of synthetic rubber and synthetic fibre technology forms a unique reinforced skeleton, which enables the sleeve to bear pressure and fatigue.

Outer layer: Using Natural Rubber to protect and reinforce the flexure resistance of valve sleeve.

Opening tags: the middle part of the outer layer is equipped with opening tags to solve the problem of fixation and tensile strength of the inner sleeve and actuator, also to ensure full opening of valves in all process conditions.


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Handmade:

Each FENGCHI pinch valve sleeve is handcrafted by professionally trained personnel, each sleeve is affixed with labels, which contains relevant parameters and numbers in order to provide a basis for quality traceability.

Material, features and matching process conditions


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Material 

Working 

Condition

Proper 

Temperature

Applicable 

Media

SBRT 

Severe wear

high-frequency operation

-40~+110℃

Abrasive material, weak acid, weak base 

and other chemical media

EPDM

Chemical applications/Applicable to  75% of

 all industrial chemical applications

-40~+120℃

Concentrated and oxidizing chemicals
NR
Strong abrasive and corrosive conditions

-40~+75℃

Abrasive materials.Weak acid, weak base 

and other chemical media

NRF
foodstuff applications-40~+75

Media used in food and other alcohol used

 in  CIP (clean-in-place) processes.

NRL

Strong abrasive and corrosive conditions

 (including slurries )

-40~+75℃

Abrasive pulp such as ore pulp.Weak acid, 

weak base and other chemical media

NBRsuitable for oil and aliphatic hydrocarbons-30~+100℃

Oil, fat, fuels, Hydrocarbons

 Lubricants, etc.

NBRF

Applications of fatty foodstuff, compliant with FDA

 (Food & Drug Administration ) requirements

-30~+100℃

Vegetable and animal oils and fats

HNBR

high temperature applications

-30~+160℃

Oils, fats, fuels, Hydrocarbons, Lubricants, 

etc.

CR

Applications of special-purpose chemicals.

Resistance  to Ozone and bad weather.

-30~+100℃

Chemicals, acids, several solvents, fatty oils, 

greases, lubricants.

FKM

Applications of special-purpose chemicals.

Resistance  to Ozone and bad weather.

-20~+120℃

Chemicals, fatty oils, aromatic and

 halogenated hydrocarbon. 

CSM

Applications of special-purpose chemicals.

Resistance  to Ozone and bad weather.

-40~+100℃

Chemicals, acids, several solvents, fatty oils, 

greases, lubricants.

IIR

Applications of special-purpose chemicals.

Impermeable to gas

-40~+100℃

Concentrates and Acidic Chemicals.

Vegetable oils.

PU

Process conditions of abrasive mediums

-10~80℃

Abrasive materials, dilute chemicals, 

hydrocarbon oils, lubricating oils.


FENGCHI pinch valve is designed specially for low maintenance, there are no seats, packing, sealing ring, or expansion pipes to replace. Valve sleeve is the only replacement needed in pinch valve. It will become an almost new pinch valve after the sleeve is replaced. FENGCHI pinch valve barely needs inventory for other components.


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