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 You are here  >> All Pictures >> Well Control Equipment and Accessories >> Gate valve
Gate valve

 DEMCO  GATE  VALVE

DM  GATE  VALVE(Interchangeable  with  Demco  Model  DM  Gate  Valve)
The  DM  Gate  Valve,  are  solid  gate,  rising  stem,  gate  valves  with  resilient  seals.  They  are  purpose  made  for  mud,  cement,  fracturing  and  water  service  and  are  easy  to  operate  and  simple  to  maintain.
Features:
-  Designed  specifically  for  Abrasive  and  Erosive  use 
-  All  Valves  Have  Stainless  Steel  Stems 
-  API  6A  PSL  1,  2  and  3  available 
-  Gates  can  be  supplied  in  Nickel-Plated  Carbon  Steel,  Monel,  Aluminum  Bronze  or  Stainless  Steel 
-  Stainless  or  Carbon  Steel  Inserts  with  Nitrile  or  HNBR  Elastomer 
-  Factory  Pressure  Tested  in  Accordance  with  API  6A 
-  Can  be  supplied  with  Flanged  End  Connections,  Hammer  Union  Ends,  Threaded  Connections  or  Butt  Weld  Ends 
-  Available  with  Pressure  Ratings  up  to  5,000  psi  in  2",  3",  4",  5"  x  4"  and  6"  x  4"  Valve  Sizes

Item

Component

Qty.

Material

1

Body

1

4130

2

Bonnet  Seal

1

NBR

3

Seat

1

Steel+NBR

4

Gate

1

410

5

Down  Stop  Ring

1

Steel

6

Stem

1

410

7

Bonnet

1

4130

8

Body  Stud

4

4140

9

Body  Nut

4

1045

10

Stem  Seal  Assy.

1

Assy.

11

Retainer

1

Steel

12

Secondary  Seal

1

NBR

13

Stem  Screw

1

Steel

14

Key

1

Steel

15

Bearing

2

TEFLON

16

Lube  Fitting

1

Assy.

17

Screw  Housing

1

Steel

18

Bonnet  Stud

2

4140

19

Bonnet  Nut

2

1045

20

Stem  Screw  Seal

1

NBR

21

Handle  Assy.

1

Steel

22

Tube

1

Clear  Acrylic

23

Stem  Protector

1

Ductile  Iron

 RISING  STEM  SLAB  GATE  VALVE

Features:
Non-rising  stem,compact  structure  ,  space  saving,available  with    flange  and  thread  connection
Full  bore  design  eliminates  efficiently  pressure  drop  and  vortex,  and  eliminates  washing  by  solids  in  fluid
Metal-to-metal  seal  is  used  between  bonnet  and  body,  gate  and  seat,  body  and  seat           
The  surface  of  gate  and  seat  is  weld  overlay  with  hard  alloy,  which  has  feature  of    corrosion  resistance  and  washing  resistance
The  bonnet  and  stem  designed  with  back  seal,  can  replace  stem  seal  ring  under  pressure
One  side  of  bonnet  is  designed  with  sealant  injection  in  order  to  supply  sealant    and  improve  seal  and  lubrication  performance  of  gate  and  seat
Working  Pressure:2000Psi~20000Psi
Nominal  Bore:1-13/16”~9”(46mm~230mm)
Working  medium:oil,  natural  gas,  and  mud
Working  temperature:-46℃~121℃(Class  L~U)
Material  Class:AA、BB、CC、DD、EE、FF、HH
Specification  level:PSL1~PSL4
Performance  Requirements:PR1~PR2
Comforms  to  API  6A

Item

Component

Qty.

Material

1

Body

1

4130

2

Bonnet  Seal  Ring

1

1010

3

Gate

1

4130

4

Gate  T-Nut

1

5140

5

Bonnet

1

4130

6

Stem  Lip  Packing

1

NBR

7

Packing  Ring

3

410

8

Packing  Gland

1

4130

9

Bonnet  Stud

8

4130

10

Bonnet  Nut

8

5140

11

Bearing

2

Assy.

12

Stem

1

410

13

Split  Busing

1

5140

14

Bearing  Cap

1

5140

15

O-ring

1

NBR

16

Handwheel

1

1035

17

Wahser

1

1035

18

Screw

1

1035

19

Oil  Cup

1

Assy.

20

Grease  Fitting

1

Assy.

21

O-ring

4

NBR

22

Seat

2

4130

23

Wave  Spring

2

410

24

Lock  Screw

3

Steel

NON-RISING  STEM  SLAB  GATE  VALVE

Features:
-  Full  bore  design  eliminates  efficiently  pressure  drop  and  vortex,  eliminates  washing  by  solids  in  fluid. 
-  Mental-to-mental  seal  is  used  between  bonnet  and  body,  gate  and  seat,  seat  and  body.
-  The  surface  of  gate  and  seat  is  welding  overlay  with  hard  alloy,  which  has  feature  of  corrosion  resistance  and  washing  resistance.
-  The  balanced  stem  can  balance  the  stem  load,  reduce  load  of  stem  thread  and  bearing  to  decrease  operating  torque.
-  The  bonnet  and  stem  are  designed  with  back  seal,  which  can  replace  stem  sealing  under  pressure.
-  One  side  of  bonnet  is  designed  with  sealant  injection  valve.
-  Rising  stem  structure  can  indicate  open  and  close  of  valve.
-  Complete  with  different  pneumatic  (hydraulic)  actuator  upon  user’s  requirements.
-  Working  Pressure:  2000PSI~20000PSI
-  Nominal  Bore:  1.13/16"~9"  (46mm~230mm)
-  Working  Medium:  oil、natural  gas、mud  and  gas  containing  H2S、CO2
-  Working  Temperature:  -46°C~121°C(Class  LU)
-  Material  Class:  AA、BB、CC、DD、EE、FF、HH-  Specification  level:  PSL1-4
-  Performance  Requirement:  PR1-2
-    Comforms  to  API  6A

Item

Component

Qty.

Material

1

Body

1

4130

2

Seat

1

1010

3

O-ring

1

4130

4

Gate

1

5140

5

Stem

1

4130

6

Bonnet  Seal  Ring

1

NBR

7

Grease  Fitting

3

410

8

Bonnet

1

4130

9

Bonnet  Stud

8

4130

10

Bonnet  Nut

8

5140

11

Packing

2

Assy.

12

Packing  Gland

1

410

13

Stem  Nut

1

5140

14

Bearing

1

5140

15

Bearing  Cap

1

NBR

16

Lock  Screw

1

1035

17

Oil  Cup

1

1035

18

Handwheel

1

1035

19

Stem  Protector

1

Assy.

 HYDRAULIC PLATE VALVE

Features
The  opening  and  closing  mechanism  of  hydraulic  plate  valve  takes  hydraulic  control  manner,  so  that  it  is  very  convenient  for  using  to  automatic  control  system  and  remote  control. 
Technical  parameters:
-  Pressure  rating:  2000~15000psi
-  Nominal  size:  1  13/16"  ~  4  1/16"
-  Operating  temperature:  P  U
-  Property  rank:  PR1-2
-  Specification  level:  PSL  1-3
-  Materiel  class:  API  6A  AA  -  FF
-  Operating  pressure  :  107~1500psi

Item

Component

Qty.

Material

1

Body

1

35  CrMo

2

Gate

1

35  CrMo

3

Seat

2

35  CrMo

4

Wave  Spring

2

2Cr13

5

O-Ring

4

NBR

6

Bonnet  Stud

8

35  CrMo

7

Stem

1

2Cr13

8

Bonnet

1

35  CrMo

9

Packing  Gland

1

35  CrMo

10

Screw

20

 

11

Lower  Gland

1

35  CrMo

12

O-Ring

2

NBR

13

O-Ring

2

NBR

14

Cylinder

1

35  CrMo

15

Piston

1

35  CrMo

16

Lock  Nut

1

40Cr

17

Upper  Gland

1

35  CrMo

18

Indicator  Rod

1

2Cr13

19

Stem  Protector

1

Q235

20

O-Ring

2

NBR

21

O-Ring

2

NBR

22

O-Ring

2

NBR

23

O-Ring

2

NBR

24

Plug

2

45

25

Bonnet  Nut

8

40Cr

26

Packing  Ring

2

2Cr13

27

Stem  Lip  Packing

5

FKM

28

Grease  Fitting

1

 


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