The line with rubber butterfly valve

The line with rubber butterfly butterfly plate installed on the diameter of the pipe direction. Cylindrical channels in butterfly valve body, disc disc rotating around the stem axis, rotation Angle for 0 ° ~ 90 °, rotate to 90 °, the valve is in the fully open position. This valve shall generally be installed in the pipeline.

1 product introduction

New the characteristics of the high life stainless steel butterfly valve and butterfly valve in use process problems

At present, the line with rubber butterfly valve, as a kind of used to realize on-off and flow control components, piping system has been used in petroleum, chemical industry, metallurgy, water and electricity is widely used in many fields such as extremely. In butterfly valve technology has been known, its seal form with seal structure, sealing materials for rubber, ptfe, etc. Because of the limitation of structural features is not adapt to the high temperature, high pressure and corrosion resistance, wear resistance, etc. Existing a more advanced butterfly valve is a triple eccentric metal hard seal butterfly valve, the valve body and seat for the Siamese components, valve seat sealing surface layer welding temperature resistant, corrosion resistant alloy material. Multilayer soft fold type sealing ring is fixed on the valve plate, the butterfly valve and the traditional butterfly valve compared with high temperature resistant, convenient operation, opening and closing without friction, closing with the torque transmission mechanism.

Working principle of the 2

Ventilation butterfly valve actuator driven by a motor to drive, make the disc plate freely within the range of 90 ° rotation to achieve the goal of open/close or adjusting medium flow.

3 line with rubber butterfly valve USES

Line with rubber butterfly valve with the spherical sealing surface lining ptfe packing

The line with rubber butterfly valve

Butterfly plate, the valve operation, strict sealing performance, long service life; Can be quickly cut off or adjust flow. Suitable for reliable sealing and good regulation characteristics required. Shaft seal at the ends of the valve body adopts the split type, by the rotation of the between disc and seat base plus fluorine rubber to control; Ensure the valve shaft is not contact with the cavity fluid. Widely used in various types of industrial liquid and gas in the pipeline transportation (including steam), has a serious corrosive medium using occasions, such as: sulfuric acid, hydrofluoric acid, phosphoric acid, chlorine, alkali and aqua regia has a strong corrosive medium.

4 line with rubber butterfly valve characteristics

1, novel design, reasonable, unique structure, light weight, rapid opening and closing.

2, small operation torque, easy to operate, saving smart.

3, can be installed anywhere, easy maintenance.

4, seal can be replaced, sealing reliable performance to achieve two-way sealing zero leakage.

5, sealing material ageing resistance, corrosion resistance, long service life, etc. With a standard

5 line with rubber butterfly valve actuators

Line with rubber butterfly valve adopts new series AT type pneumatic actuator, a double-acting and single acting (spring reset), gear transmission, safe and reliable; Large diameter valve adopts series AW pneumatic actuator fork type transmission, reasonable structure, large output torque, a double-acting and single acting.

1, gear type double piston, output torque, small volume.

2, selection of cylinder aluminum alloy material, light weight, good appearance.

3, can be installed on the top and bottom manual operating mechanism.

4, the rack type connection adjustable opening Angle, rated flow.

5, actuators optional electric signal feedback instructions in order to realize automation and all kinds of accessories.

6, IS05211 standard connection provides convenience for the installation of the product replacement.

Section 7, both ends of the screw can make the standard product at 0 ° and 90 ° with a adjustable range of plus or minus 4 °. To ensure synchronization precision and valves.

6 when used

Line with rubber butterfly valve in use process there are still some problems: increases to compensate for sealing, improve the butterfly valve sealing performance and prolong the service life of the advantages.

One, due to multi-layer soft fold type sealing ring fixed in the valve plate, when the valve plate normally open state media on the sealing surface to form positive scour, metal

Piece of sandwich the soft sealing strip after flushing, directly affect the sealing performance.

Second, restricted by structure condition of the structure does not adapt to do below path DN200 valves, because the valve plate structure is too thick, large flow resistance.

Third, because of the principle of the line with rubber butterfly valve, sealing surface of valve plate and valve seat on drive torque is the seal between the valve plate pressure to the valve seat. Is flow state, the higher the medium pressure seal compression tight. When the countercurrent flow medium with the increase of medium pressure valve plate and valve seat unit is less than the pressure medium, the positive pressure between seal began to leak.

High-performance line with rubber butterfly valve,

It has the following characteristics: the seat sealing by soft t-shaped sealing ring on both sides of the multi-layer pieces of stainless steel.

Valve plate and valve seat sealing surface for the oblique cone structure, the valve plate oblique cone surface welding heat resistance, corrosion resistant alloy material; Fixed between the adjusting ring clamp spring together with the clamp on adjusting bolt assembly structure. This structure can effectively compensate the tolerance zone between sleeve and body and the elastic deformation of the stem under medium pressure, solve the valves in the process of the two-way exchange medium conveying the sealing problems.

Soft T on both sides of the multi-layer stainless steel pieces of sealing ring, with metal sealing and soft sealing the dual advantages of under low temperature and high temperature circumstances, all with zero leakage sealing performance. Trials show that pool is flow state (medium flow direction is same as the rotation direction of the butterfly plate), the sealing surface pressure is the drive torque and the medium pressure in the valve plate. Positive medium pressure valve plate oblique cone surface and valve seat sealing surface squeezed more tightly, sealing effect is better.

When the current state, between the valve plate and valve seat sealing pressure on drive torque make the valve plate to the seat. As the reverse medium pressure increases, the unit is pressure between the valve plate and valve seat is less than the pressure of medium, the adjusting ring after the loading of the spring deformation energy stored by compensating valve plate and valve seat sealing surface of the tight pressure automatic compensation effect.

So the utility model is not like the existing technology, soft hard multi-layer sealing ring, installed in the valve plate directly installed on the valve body, in the middle of the plate and seat add adjustable ring is the ideal way of two-way hard seal. It will replace gate, and the spherical valve

Seven product categories

1, according to the classification of structure form

(1) the center seal butterfly valve

(2) single eccentric valve seal coal

(3) double eccentric butterfly valve seal

(4) three eccentric sealing tap valve

2, according to the sealing surface material classification

(1) soft sealing butterfly valve.

1) seal made of nonmetal soft materials of nonmetal soft materials.

2) seal hard material from metal to non-metal of soft materials.

(2) the metal hard seal butterfly valve. Seal hard material from metal to metal hard material.

3, classified by sealing form

(1) the forced sealing butterfly valve

1) elastic sealing butterfly valve. Sealing pressure by closing valve plate extrusion valve seat, valve seat or valve plate elasticity

2) plus torque seal butterfly valve. Sealing pressure produced by plus on the valve shaft torque

(2) pressurized sealing butterfly valve. Sealing pressure by seat or play a seal on the valve plate element pressurized

(3) automatic sealing butterfly valve. Sealing pressure produced by medium pressure automatically.

4, according to the working pressure classification

(1) the vacuum butterfly valve. Working pressure is lower than the atmosphere of butterfly valve.

(2) low pressure butterfly valve. Nominal pressure PN < 1.6 MPa butterfly valve.

(3) the intermediate pressure butterfly valve. Nominal pressure PN 2.5-6.4 MPa butterfly valve.

(4) high pressure butterfly valves. Nominal pressure PN to 10. 0-80.0 MPa butterfly valve.

(5) the ultrahigh pressure butterfly valve. Nominal pressure PN > 100 mpa butterfly valve.

5, according to working temperature

(1) high temperature butterfly valve. T > 450 C of the butterfly valve

(2) medium temperature butterfly valves. 120 C < t < 450 C of the butterfly valve

(3) the normal temperature butterfly valves. A 40 c < t <; 120 C of the butterfly valve

(4) cryogenic butterfly valve. A 100 < t < 40 C butterfly valve

(E) cryogenic butterfly valve. T < 100 C of the butterfly valve

6, according to the connection mode classification

The wafer butterfly valve (1)

(2) the flange butterfly valve

(3) a lug butterfly valve