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Gate Valves

Two Gate Valves
Gate Valve diagram

Material Specifications tableSpecifications subject to change without notice.

Material Specifications table
Specifications subject to change without notice.


Recommended Welding Procedure CR-ASME-SEC IX

  1. Machine Bevel Pipe Ends as shown on detail.
  2. Use 1/16" root spacing.
  3. Pre-heat weld area to 200° F.
  4. Apply Stringer Bead with 5/32" dia. E-6010 Electrode.
  5. Clean weld and apply filler passes with 5/32" dia. E-7018 electrode, clean between each pass.
  6. Cover pass should build up to 1/32" to 1/16" above pipe O.D. Use 5/32" dia. E-7018 electrode for cover pass.
  7. Post-heat weld area to 500° F. and allow to cool slowly, shielded from wind with asbestos blanket.

Standard Material - 3000 WP

Standard Materials: Cast Steel Body and Bonnet; Buna N Seat and Seals;
Ductile Iron Seat Inserts; 303 SS Stem; Steel Gate
FULL PORT
2"
3"
4"
 
FIGURE NUMBER
2-3000
3-3000
4-3000
Screwed End
Base Part No.
2027
3046
4049
Screwed End Valves furnished for API Line Pipe ... EUE 8 round on 2" valves, if specified.
Weight, lbs.  
53
113
162
Weld End
FIGURE NUMBER
2030
3055
4058
Weld End Valves furnished for Sch. 80 and Sch. 160 on 3000 WP valves XXH and Sch. 160 on 5000 WP.
RTJ Flanged End
FIGURE NUMBER
2024
3037
4040
Weight, lbs.  
100
175
265
RTJ Flanged comply with API Std. 6A 1974

REGULAR PORT  
-
4" x 3"
5" x 4"
-
 
FIGURE NUMBER
-
4-3000R
5-3000R
-
Weld End
Base Part No.
-
3113
4111
-
Weight, lbs.  
-
113
162
-

Standard Material - 5000 WP

Standard Materials: Cast Steel Body and Bonnet; Buna N Seat and Seals;
Ductile Iron Seat Inserts; 303 SS Stem; Steel Gate
FULL PORT
2"
3"
4"
 
FIGURE NUMBER
2-5000
3-5000
4-5000
Screwed End
Base Part No.
2028
3047
4420
Screwed End Valves furnished for API Line Pipe ... EUE 8 round on 2" valves, if specified.
Weight, lbs.  
61
140
210
Weld End
FIGURE NUMBER
2031
3056
4420
Weld End Valves furnished for Sch. 80 and Sch. 160 on 3000 WP valves XXH and Sch. 160 on 5000 WP.
RTJ Flanged End
FIGURE NUMBER
2025
3038
4420
Weight, lbs.  
110
241
330
RTJ Flanged comply with API Std. 6A 1974

REGULAR PORT  
4" x 3"
5" x 4"
6" x 4"
 
FIGURE NUMBER
4-5000R
5-5000R
6-5000R
Weld End
Base Part No.
3110
5420
6420
Weight, lbs.  
140
210
210

Optional Materials
316 SS Stem, Gate and Seat Insert
(888)
316 SS Stem, Monel Gate and Seat Insert
(833)
NACE Seat and Seals, HNBR
(2)
Plastic Coating Assembly
(1)
Bonnet Coating Only (Weld End)
(1)


Dimensions, Inches

Pressure Rating and Size
3000 PSI WP / 6000 PSI Test
2"
3"
4"
5"
A Screwed, and Weld          
 
-Full Port
9
11
13
-
 
-Regular Port
   
11
13
 
-Flanged -RTJ
11 5/8
14 1/8
16 3/8
-
B (Open) - Full Port  
13
18
21 1/4
-
 
-Regular Port
   
21 1/4
C (Seat Bore) - Full Port  
2
3
4
-
 
-Regular Port
     
4
D Full Port  
14
19
23
-
 
-Regular Port
   
19
23
F (Flange Diameter)  
8 1/2
9 1/2
11 1/2
-
   Flange Bolts
No. Size
8 7/8
8 7/8
8 1/8
-
   Ring Number (RTJ)  
R24
R31
R37
-

Pressure Rating and Size
5000 PSI WP / 10,000 PSI Test
2"
3"
4"
5"
6"
A Screwed, and Weld            
 
-Full Port
9
11
13
-
-
 
-Regular Port
   
11
13
13
 
-Flanged -RTJ
12 1/8
15 5/8
18
-
-
B (Open) - Full Port  
13
18
24 5/8
-
-
 
-Regular Port
   
18
24 5/8
24 5/8
C (Seat Bore) - Full Port  
2
3
4
-
-
 
-Regular Port
   
3
4
4
D Full Port  
14
19
23
-
-
 
-Regular Port
   
19
23
23
F (Flange Diameter)  
8 1/2
10 1/2
12 1/4
-
-
   Flange Bolts
No. Size
8 1/8
8 1/8
8 1/4
-
-
   Ring Number (RTJ)  
R24
R35
R39
-
-

Gate Valve Parts

2" - 3000 WP and 5000 WP
Gate Valve Diagram
Ref.
Description
1
Lube Fitting - steel
2
Hub Assembly - steel
4
Lock Handle - steel
6
Stem Screw - steel
7
Stem Screw Seal - Buna N
8
Screw Housing - steel
9
Stem - 303 SS / 316 SS
10
Secondary Seal - Buna N
11
Retainer - steel
12
Stem Seal Assembly (includes bronze bushing)
Buna N / NACE
13
Lock Screw - steel
15
Coupling - WCB steel
16
Bonnet - ANSI 1029 Steel
Uncoated / Coated
17
Index Pin - steel
18
Bonnet Seal - Buna N / NACE
19
Gate - steel
Nickel plated / Monel / 316 SS
20
Body, Uncoated - steel
Full Port-Screwed-API LP
-Weld (Sch. 80 / Sch. XXH / Sch. 160-Flanged-RTJ )
Body Coating
21
Seat
Ductile Iron - Buna N / NACE
Monel - Buna N / NACE
316 SS - Buna N / NACE
22
Pin, Lock Handle - steel
  Bonnet Assembly with Gate
  Seal Kits - 4 pieces - Buna Seals
1 ea. - Ref. 7, 10, 12, 18
  Minor Repair Kit - 3 pieces
1 ea. - Ref. 18, 19, 21
  Major Repair Kit - 6 pieces
1 ea. - Ref. 7, 10, 12, 18, 19, 21

3" 3000 WP (4"x3"), 3" 5000 WP, (4"x3"), and 4" 3000 WP (5"x4")
Ref.
Description
Gate Valve Diagram
1
Lube Fitting - steel
2
Hub Assembly - steel
4
Lock Handle - steel
6
Stem Screw - steel
7
Stem Screw Seal - Buna N
8
Screw Housing - steel
9
Stem - 303 SS / 316 SS
10
Secondary Seal - Buna N
11
Retainer - steel
12
Stem Seal Assembly (includes bronze bushing)
Buna N / NACE
16
Bonnet - A148 Steel
Uncoated / Coated
18
Bonnet Seal - Buna N / NACE
19
Gate - steel
Nickel Plated / Monel / 316 SS
20
Body, Uncoated, Steel - Full Port-API LP
Full Port-Weld (Sch. 80 / Sch. XXH / Sch. 160-Flanged-RTJ)
Reg Port-Weld Only (Sch. 80 / Sch. XXH / Sch. 160)
Body Coating
21
Seat
Ductile Iron - Buna N / NACE
Monel - Buna N / NACE
316 SS - Buna N / NACE
22
Pin, Lock Handle - steel
23
Bonnet Stud (2 required) - A193 B7 Steel
24
Bonnet Stud Nut (2 required) - Carbon Steel A194 2H
25
Body Stud (4 required) - A193 B7 Steel
26
Body Stud Nut (4 required) - Carbon Steel A194 2H
  Bonnet Assembly with Gate
  Seal Kits - 4 pieces - Buna Seals
1 ea. - Ref. 7, 10, 12, 18
  Minor Repair Kit - 3 pieces
1 ea. - Ref. 18, 19, 21
  Major Repair Kit - 6 pieces
1 ea. - Ref. 7, 10, 12, 18, 19, 21

4", 5"x4", and 6"x4" - 5000 WP
Gate Valve Diagram
Ref.
Description
1
Lube Fitting - steel
2
Hub Assembly - steel
3
Tube - steel
4
Stem Cap - ductile iron
5
Key - steel
6
Stem Screw - steel
7
Stem Screw Seal - Buna N
8
Screw Housing - steel
9
Stem - 303 SS / 316 SS
10
Secondary Seal - Buna N
11
Retainer - steel
12
Stem Seal Assembly (includes Bronze Bushing)
Buna N / NACE
13
Bearing (2) - Teflon/Phenolic
14
Down Stop Ring - 303 SS
16
Bonnet-A148 Steel
Uncoated / Coated
18
Bonnet Seal - Buna N / NACE
19
Gate - Steel, Nickel Plated - Monel / 316 SS
20
Body, Uncoated*, Steel - Full Port-Screwed-API LP
Weld-4" Full Port (Sch. XXH / Sch. 160- Flanged-RTJ)
Reg. Port-Weld 5" x 4" (Sch. XXH / Sch. 160)
Reg. Port-Weld 6" x 4" (Sch. XXH / Sch. 160)
Body Coating
21
Seat
Steel - Buna N / NACE
Monel - Buna N / NACE
316 SS - Buna N / NACE
23
Bonnet Stud (2) - A193 B7 Steel
24
Bonnet Stud Nut (2) - Carbon Steel A194 2H
25
Body Stud (4) - AISI 4140 HT Steel
26
Body Stud Nut (4) - Carbon Steel / AISI 414004145
Bonnet Assembly with Gate

*Replacement bodies must include 4 Body Studs.

Caution: Test valve assembly including replacement body before use. Failure to do so may result in leakage and/or personal injury or property damage.


Repair Kits - Size 4", 5"x4" and 6"x4"
Seal Kit - 4 Pieces - All Buna seal
Ref. 7, 10, 12
Minor Repair Kit - 3 pieces - Seal, Gate, Bonnet Seal
Ref. 18, 19, 21
Major Repair Kit - 6 pieces - Seal Kit, Gate, Seat
Ref. 7, 10, 12, 18, 19, 21


2000, 3000, 5000 WP Gate Valves
Conforming to API Flange Dimensions and Pressure Fittings

Gate Valve Diagram
Gate Valve Diagram

Disassembly

Gate Valves for high pressure service are readily disassembled and reassembled without removing the body from the line. Inspection and repair may be accomplished in a short time to restore the valve to full operating efficiency.

Release all pressure from the line in which the valve is installed. If downstream from another closed valve under pressure, that valve should be locked or sealed and tagged to prevent opening while this work is being done.

  1. Fully open the gate valve. Remove nuts (26) (unscrew coupling (15) on 2" valves) and withdraw the bonnet assembly from the body. Collapse the seat (21), by compressing the insert pins together, and remove it from the body.

  2. With the bonnet assembly on its side, remove pin (22) and lock handle (4), then lift off hub (2). Remove coupling (15) on 2" valves. Turn stem screw (6) clockwise to bottom, then withdraw gate (19) from stem (9) by rotating a quarter turn and sliding it off the tee-head of the stem.

  3. Seat or gate replacement may be made at this point. To reassemble the valve, proceed from reassembly instruction 3. If it is desired to inspect other parts, the following instructions apply.

  4. Turn the stem clockwise until it disengages from stem screw (6) and withdraw it from the underside of the bonnet. Unscrew the lock screw (13) on 2" valves or nuts (24) on other sizes and lift screw housing (8) off of the bonnet. Remove retainer (11), o-ring seal (10) and stem seal assembly (12) from the bonnet. Turn stem screw (6) clockwise out of the screw housing. Remove screw seal (7) from the screw housing and bonnet seal (18) from the valve body.

Thoroughly clean all parts and inspect them or wear or damage. It is recommended that seats (7), (10), (18), and stem seal assembly (12) be replaced if they are worn or cut. Inspect the outside surface of the stem, where it passes through the packing, for nicks or scratches and smooth with an emery cloth if necessary. Before reassembling apply a good grade of general purpose grease to all threads, seal rings, exterior of the seat, and on the surfaces of the bonnet, stem, and stem screw, which are are contact with seals.

AWDs logo

 

Reassembly

  1. Slide the threaded end of the stem through the bonnet bore, from the underside, and place the stem seal assembly over the stem. This assembly consists of the seal rings, a flat-backed follower ring and a bushing, which are placed over the end of the stem in that order. Slide the retainer (11), with o-ring seal (10) inside, beveled side first, over the stem. Seat the stem seal assembly into its counterbore in the bonnet.

  2. Engage the stem screw (6) in the screw housing (8) about half of its total travel and place the screw housing on the bonnet and stem. Replace lock screw (13) on 2" valves or nuts (24) on other sizes. Place the coupling on the screw housing of 2" valves.

  3. Rotate the stem screw clockwise until it bottoms on the retainer, and then back it up approximately one-eighth turn. Engage the gate on the tee-head of the stem and turn them together, counterclockwise, until the gate touches the underside of the bonnet lugs. Align the gate with the opening between the lugs and retract it into the bonnet by turning the stem screw counter-clockwise. Place the hub on the stem screw, insert the lock handle, and retain it with the cotter pin. Do not spread the pin since it may be removed later while adjusting the gate level.

  4. Install the seat on the bonnet and stand the assembly upright, resting on the seat. Turn the handle clockwise until the hub is stopped by the top of the screw housing. Make a pencil mark on one side of the gate, even with the bottom of the seat port. Raise the bottom of the gate into the seat bore, by rotating the handle, and measure the distance from the pencil mark to the bottom of the gate. This distance must be within the following limits for each size valve (see chart below). If the distance is correct, proceed to assembly step 5. If not, remove the seat, lock the handle and hub from the assembly. Rotate the stem screw clockwise to bottom. Turn the gate and stem together while holding the stem screw: counter-clockwise to reduce the distance or clockwise to increase the distance as required. One-half turn of the gate and stem changes the distance approximately 1/16". Repeat step 4 until the closed gate position is correct.

  5. Replace bonnet seal (18) and install the seat and bonnet in the body, making sure the gate is started into the seat and the top pins on the seat are started into the drilled holes in the bonnet. Tighten the coupling on 2" valves; on other sizes, replace and tighten nuts (26). Spread the cotter pin (22) in the lock handle and replace the hub with general purpose grease through fitting (1). When the high pressure gate valve is reassembled in the manner described, the hub is stopped by the screw housing at the proper down position of the gate. Overtightening is impossible and maximum sealing efficiency is assured.
    2"   2 1/2"
    3"
    4"
    5/16"-7/16"
    3/8"-1/2"
    3/8"-1/2"
    7/16"-9/16"

5000 WP Gate Valves
4" Full Port, 5" Regular Port
Conforming to API Flange Dimensions and Pressure Ratings

Disassembly

Gate Valves for high pressure service are readily disassembled and reassembled without removing the body from the line. Inspection and repair may be accomplished in a short time to restore the valve to full operating efficiency.

Release all pressure from the line in which the valve is installed. If downstream from another closed valve under pressure, that valve should be locked or sealed and tagged to prevent opening while this work is being done.

  1. Fully open the gate valve. Remove nuts (26) and withdraw the bonnet assembly from the body. Collapse the seat (21), by compressing the insert pins together, and remove it from the body.

  2. With the bonnet assembly on its side, turn the handle (2) clockwise, then move the gate (19) out of the bonnet. Withdraw the gate from stem (9) by rotating a quarter turn and sliding it off of the tee-head of the stem.

  3. Seat or gate replacement may be made at this point. To reassemble the valve, proceed from reassembly instruction 4 after following the application maintenance instructions. If it is desired to inspect other parts, the following instructions apply.

  4. Remove stem cap (4), tube (3), handle (2), and key (5). Remove nuts (24) and lift off the screw housing (8). Rotate the stem screw (6) off of the stem (left-hand Acme) and remove bearings (13) and retainer (11). Lift the stem part way so that the down stop ring (14) may be removed, then withdraw the stem from the underside of the bonnet. The stem seal assembly (12), including the bushing, may now be removed.

Thoroughly clean all parts and inspect them for wear or damage. It is recommended that seals (7), (10), (18) and stem seal assembly (12) be replaced if they are worn or cut.

All sealing surfaces should be clean and free of dirt, rust, nicks, and scratches.

These will include the areas inside the body adjacent to the line bore where the seat fits, the area around the lower part of the bonnet that lies against the bonnet o-ring seal, the bonnet stuffing box, and the surface of the stem that passes through the packing.

Clean these surfaces well and polish with emery cloth if necessary, paying particular attention to the valve stem. Also clean and polish the surfaces of the stem screw that run against the bearings.

Before reassembling, apply a good grade of general purpose grease to all threads, bearings, seal rings, and exterior of the seat and on the surfaces of the bonnet, stem, and stem screw, which are in contact with seals.

AWDS logo

 

Gate Valve Diagram

Reassembly

  1. Slide the threaded end of the stem (9) through the bonnet bore from the underside and draw the stem head part way up into the bonnet. Put the down stop ring (14) on over the bottom of the stem head, lower the stem so that the down stop ring shoulders on the inside of the bonnet and slide the gate (19) onto the tee-head of the stem.

  2. Place the stem seal assembly (12) over the stem. This assembly consists of seal rings, a flat-backed follower ring, and a bushing, which are placed over the end of the stem (in that order). Work the seal and follower rings carefully down over the stem thread lips first and into the stuffing box, being careful that the lips of the rings do not get curled back. After the bushing put the retainer (11), with o-ring seal (10) inside, down over the stem, flat side up.

  3. Follow the retainer with a bearing (13) and the stem screw (6). The bearing must be concentric with the stem screw before further assembly. It can be held in place by turning the stem screw counterclockwise until the stem head back seats against the bonnet. Place another bearing down over the stem screw and follow it with the screw housing (8), with o-ring seal (7) inside, and tighten nuts (24). Put the key (5) into its slot in the stem screw and replace the handle (2), tube (3), and stem cap (4) (in that order).

  4. If the valve was not torn down completely to begin with, the gate is replaced at this point. Slide the gate (19) onto the stem, turn it a quarter turn to line up with the slot in the bonnet, and draw it up all the way into the bonnet by turning the handle counterclockwise. Place the seat (21) in the valve body, keeping the top pins on the seat in line with the body line bore. Replace the bonnet seal (18) and put the bonnet assembly on the body, making sure the gate is started into the seat and the top pins on the seat are started into the drilled holes in the bonnet before tightening nuts (26). Tighten nuts (26) and repack the screw housing (8) with general purpose grease through fitting (1).