SLAB GATE VALVE (NON-RISING STEM)
The Non-rising stem slab gate valves manufactured by Shanghai MAC Machinery Co., Ltd. are available in temperature classes L, P, R, S, T, and U specified in API 6A. Gate valves to be used in the 350¨H or 650¨H high temperature can be supplied on request. Gate valves manufactured by our company are available in 3000psi, 5000psi and 10000psi working pressure, nominal size from 1-13/16" through 4-1/16",material classes from AA through FF, product specification levels (PSL) from 1 through 3 and performance requirement (PR) 1.

SPECIFICATION:
¡ñ Manufactured and Tested in Accordance with API Spec 6A
¡ñSimple structure and renewable gate and seat assembly.
¡ñOne-piece and double-acting gate with long service life.
¡ñBoth thrust bearings with large load capacity and composite rubber-plastic stem lip packing minimize operational torque.
¡ñBearing cap is provided with a grease cup to make it easy to inject lubricating grease in the field.
¡ñThreaded packing gland allows removal of bearings and stem packing under line pressure.
¡ñBoth the bolted bonnet and modern bonnet seal ring provide simple structure and reliable sealing.
¡ñThe sealing surfaces of the gate and seat are hardfaced for wear and corrosion resistance.
¡ñWave springs are installed between the body and seat and between the gate and seat. The gate and seat still maintain a positive metal to metal seal under low pressure.
¡ñFloating gate design requests the hand wheel to be backed off 1/4 turn after its rotation can go no further.

Note:
Under pressure, the valve is forbidden to be semi-shrouded, for it will do great harm to the gate valve


5000psi Flanged Ends

5000psi Threaded Ends

10000psi Flanged Ends

Parts Lists

Item

Description

Qty

Material

Remark

1

Body

1

4130

 

*2

Seat

2

4130+HF

 

*3

Seat Seal Ring

4

NBR

 

*4

Wave Spring

2

410

 

*5

Gate

1

4130+HF

 

*6

Stem Screw

1

Steel

 

*7

Stem

1

410

 

*8

Bonnet Seal Ring

1

Steel

 

9

Bonnet

1

4130

 

*10

Grease Screw

1

Assy.

 

11

Bonnet Stud

8

4140

 

12

Bonnet Nut

8

5140

 

*13

Stem Seal Assy.

1

Assy.

 

14

Packing Gland

1

Steel

 

*15

Bearing

2

Assy.

 

16

Bearing Bushing

1

Steel

 

*17

Sec. Seal

1

NBR

 

18

Screw Housing

1

Steel

 

19

Lock Screw

1

Steel

 

*20

Lube Fitting

1

Assy.

 

21

Hub Assy.

1

Steel

 

22

Washer

1

Steel

 

23

Lock Nut

1

Steel

 

* Major Repair©¤ One Each For One Year¡¯s Service

 

SLAB GATE VALVE (RISING STEM)
The rising stem slab gate valves manufactured by Shanghai MAC Machinery Co., Ltd. are available in temperature classes L, P, R, S, T, and U specified in API 6A. Gate valves to be used in the 350¨H or 650¨H high temperature can be supplied on request. Gate valves manufactured by our company are available in 3000psi, 5000psi and 10000psi working pressure, nominal size from 1-13/16" through 4-1/16",material classes from AA through FF, product specification levels (PSL) from 1 through 3 and performance requirement (PR) 1.
The rising stem slab gate valves manufactured by our company have the same characters as the non-rising stem slab gate valves. For it is designed by rising stem, the close and open of the valves is completely controlled .
SPECIFICATION:
¡ñ Manufactured and Tested in Accordance with API Spec 6A
¡ñSimple structure and renewable gate and seat assembly.
¡ñOne-piece and double-acting gate with long service life.
¡ñBoth thrust bearings with large load capacity and composite rubber-plastic stem lip packing minimize operational torque.
¡ñBearing cap is provided with a grease cup to make it easy to inject lubricating grease in the field.
¡ñThreaded packing gland allows removal of bearings and stem packing under line pressure.
¡ñBoth the bolted bonnet and modern bonnet seal ring provide simple structure and reliable sealing.
¡ñThe sealing surfaces of the gate and seat are hardfaced for wear and corrosion resistance.
¡ñWave springs are installed between the body and seat and between the gate and seat. The gate and seat still maintain a positive metal to metal seal under low pressure.
¡ñFloating gate design requests the hand wheel to be backed off 1/4 turn after its rotation can go no further.
Note:
Under pressure, the valve is forbidden to be semi-shrouded, for it will do great harm to the gate valve and great reduce the service life of the valve.


5000psi Flanged Ends

10000psi Flanged Ends

Parts Lists

Item

Description

Qty

Material

Remark

1

Body

1

4130

 

*2

Seat

2

4130+HF

 

*3

Seat Seal Ring

4

NBR

 

*4

Wave Spring

2

410

 

*5

Gate

1

4130+HF

 

*6

Stem

1

410

 

*7

Bonnet Seal Ring

1

Steel

 

8

Bonnet

1

4130

 

*9

Grease Screw

1

Assy.

 

*10

Stem Seal Assy.

1

Assy.

 

11

Bonnet Stud

8

4140

 

12

Bonnet Nut

8

5140

 

13

Packing Gland

1

Steel

 

*14

Bearing

2

Assy.

 

*15

Stem Screw

1

Steel

 

16

Screw Housing

1

Steel

 

17

Lock Screw

1

Steel

 

*18

Lube Fitting

1

Assy.

 

*19

Sec. Seal

1

NBR

 

20

Hub Assy.

1

Steel

 

21

Stem Cap

1

Steel

 

* Major Repair©¤ One Each For One Year¡¯s Service

 

HYDRAULIC SLAB GATE VALVE
The hydraulic slab gate valves manufactured by our company adapt hydraulic control, used extensively in the automatic control system and remote control, work steadily and use freely. Main specifications and technical parameters.
Nominal pressure: 3000psi¡«10000psi
Nominal size: 1-13/16¡å¡«4-1/16¡å
Working temperature: P U
PR1;PSL1,2,3; AA-FF;OP: 100¡«1500psi

Parts Lists

Item

Description

Qty

Material

Remark

1

Body

1

4130

 

*2

Seat

2

4130+HF

 

*3

Seat Seal Ring

4

NBR

 

*4

Wave Spring

2

410

 

*5

Gate

1

4130+HF

 

*6

Stem Screw

1

Steel

 

*7

Stem

1

410

 

*8

Bonnet Seal Ring

1

Steel

 

9

Bonnet

1

4130

 

*10

Grease Screw

1

Assy.

 

11

Bonnet Stud

8

4140

 

12

Bonnet Nut

8

5140

 

*13

Stem Seal Assy.

1

Assy.

 

14

Lower Lock Screw

10

Steel

 

15

Lower Gland

1

4130

 

*16

Seal Ring

2

NBR

 

17

Cylinder

1

4130

 

18

Plug

2

Steel

 

*19

Seal Ring

2

NBR

 

*20

Seal Ring

2

NBR

 

21

Piston

1

4130

 

22

Lock Nut

1

Steel

 

*23

Seal Ring

2

NBR

 

*24

Seal Ring

2

NBR

 

25

Upper Gland

1

4130

 

26

Upper Lock Screw

10

Steel

 

27

Indicator Rod

1

410

 

28

Stem Cap

1

Steel

 

* Major Repair©¤ One Each For One Year¡¯s Service

 
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