Gate Valve

DEMCO GATE VALVE

DEMCO GATE VALVEDM 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

RISING STEM SLAB GATE VALVEFeatures:

-  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

RISING STEM SLAB GATE VALVE EXPLODED

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

NON-RISING STEM SLAB GATE VALVEFeatures:

- 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

NON-RISING STEM SLAB GATE VALVE EXPLODED

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

HYDRAULIC PLATE VALVEFeatures

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

 

HYDRAULIC PLATE VALVE EXPLODED

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