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Gate Valves

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Gate Valves

pMUD KING PRODUCTS GATE VALVES PRODUCT DESCRIPTION The Mud King DM Buna N Seat Duct Iron Seat Inserts; 316 SS Stem; Steel Gets FULL PORT 439;39; FIGURE NUMBER 4 - 5000 SCREWED END Base Part No. M7420 Weight, Lbs. 210 WELD END Base Part No. M7420 Weld End valves furnished for Sch. 80, XXH and Sch. 160 on 5000 WP Weight, Lbs. 210 RTJ FLANGED END Base Part No. M17263 RTJ flanges comply with API Std. 6A, 1974 Weight, Lbs. 330 REGULAR PORT 539;39; 439;39; 5-5000R WELD END Base Part No. M7421 Weight, Lbs. 210 Page 1 GATE VALVE DM PARTS LIST 4“, 5“ 4“ – 5000 WP 4“ REF. DESCRIPTION SIZE 5“ 4“ 1 LUBE FITTING Steel M5195 2 HANDLE ASSEMBLY Steel M7414 Wt. Lbs. 10.1 3 TUBE Clear Acrylic M7459 4 STEM CAP Ductile Iron M7411 5 KEY Steel M5305-10016 6 STEM SCREW Steel M7416 7 STEM SCREW SEAL Buna N M5526-226 8 SCREW HOUSING Steel M7418 9 STEM 303 SS - 002 M7439-xxx 3I6 SS - 008 10 SECONDARY SEAL Buna N M5526-214 11 RETAINER Steel M7413 12 STEM SEAL ASSEMBLY M1951-xxx Includes Bronze Bushing Buna N - 001 Viton - 006 13 BEARING 2 Teflon/Phenolic M7426 14 DOWN STOP RING 303 SS M7417 16 BONNET - 4“ SCREWED Buns N Seat Duct Iron Seat Inserts; 316 SS Stem; Steel Gets FULL PORT 2” 3” FIGURE NUMBER 2-5000 3-5000 SCREWED END Bass Part No. M1028 M1047 Screwed End valves furnished for line pipe unless otherwise specified EUE 8 round on 2“ valves; NUE 10 round on 3“, NUE 8 round on 4“ Weight, Lbs. 61 140 WELD END Base Part No. M1031 M1056 Weld End valves furnished for Sch. 80 on 2000 wp valves; Sch. 80 and Sch. 160 on 3000 wp; Sch. 80, XXH and Sch. 169 on 5000 wp Weight, Lbs. 61 140 GROOVED END Base Part No. * * * * * * * * Grooved End valves furnished for Sch. 80 pipe Weight, Lbs. * * * * * * * * RTJ FLANGED END Base Part No. M1025 M1038 RTJ Flanges comply with API Std. 6A, 1974 Weight, Lbs. 110 241 Pressure Rating 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 emery cloth if necessary. Before reassembling, apply a good grade of general purpose grease to all threads, seal rings and exterior of the seat and on the surfaces of the bonnet, stem and stem screw which are in contact with seals. REASSEMBLY 1. Slide the threaded end of the stem through the bonnet bore, from the underside, and place the stem seal 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 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, then back it up approximately one-eighth turn. Engage the gate on the tee-head of the stem and turn them together, counter-clockwise, 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 2“ nbsp; nbsp; nbsp; nbsp;3“ If the distance is correct, proceed to assembly step 5. If not, remove the seat, lock handle and hub from the assembly. Rotate the stem screw clockwise to bottom. Turn the gate and stem together, while holding the stem screw counterclockwise 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 the 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 MUD KING 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. Over tightening is impossible and 5 / 16 “ – 7 / 16 “ 3 / 8 “ – 1 / 2 “ DM REBUILD INSTRUCTION 2”, 3” - 5000 WP Page 7 DISASSEMBLY MUD KING 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 operation 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 instruction apply. 4. Remove stem cap 4, tube 3, handle 2 and key 5. Remove nuts 24 and lift off the screw 6 off 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 includes the areas inside the body adjacent to the line bore where the seat fits, the area around the lower part of 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 bearing. Before reassembling, apply a good grade of general purpose grease to all threads, seal rings and exterior of the seat and on the surfaces of the bonnet, stem and stem screw which are in contact with seals. 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 threads lips 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 with 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 all the way into the bonnet by turning the handle counter-clockwise. 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 the nuts 26. Tighten nuts 26 and repack the screw housing 8 with general purpose grease through fitting l. GATE VALVE DM REBUILD INSTRUCTION 4”, 5” x 4” - 5000 WP Page 8 GATE VALVE MODEL 72 ASSEMBLY PART NUMBER DIMENSIONS amp; WEIGHTS Standard Assemblies 5000 WP Size 2” 3” 4” Weld End - Regular Port Sch.xxH -10x Sch.160 -11x Gate Packing/Stem Packing/O-Ring Buna N -xx1 Viton Seat -xx2 M112000-xx M113000-xx M114000-xx Screwed End - Full Port LP -20x NUE -21x Gate Packing/Stem Packing/O-Ring Buna N -xx1 Viton Seat -xx2 M122000-xxx M123000-xxx M124000 Flanged End Raised Race -30x RTJ -31x Gate Packing/Stem Packing/O-Ring Buna N -xx1 Viton Seat -xx2 M132000-xxx M133000-xxx M134000-xxx The MKP Model 72 gate valve is designed for easy operation and long life before maintenance is required. The valve is hydrostatically tested after assembly per API-6D requirements. With removable body subs and split bonnet design, field repair is simple and quick with no timing of the gate required. 2” 3” 4” A - Threaded 9 11 13 B - Flanged 11 5/8 15 5/8 18 C - All 3 7/16 4 1/4 4 3/4 D - All 15 13/16 20 9/16 24 1/4 E - All 17 1/4 20 21 1/2 F - Flanged 8 1/2 10 1/2 12 1/2 G - Flanged 1 13/16 2 3/16 2 7/16 H - All, Min. Bore 2 3 4 Weightlbs Threaded 98 188 272 Flanged 140 254 384 Page 9 GATE VALVE MODEL 72 PARTS LIST 2”, 3”, 4” - 5000 WP 5000 WP REF DESCRIPTION 2” 3” 4” 1 Handwheel M120132 M120142 M120143 2 Stem Nut M120232 M120242 M120243 3 Gate nbsp; nbsp; nbsp; nbsp; nbsp;Stainless Steel M120323 M120333 M120343 4 Split Bonnet Assembly M120432 M120442 M120443 5 Bonnet Bolt M120532 M120542 M120543 6 Bonnet Nut M120623 M120623 M120623 7 Stem Packing Buna N -1 Viton -2 M120732-x M120742-x M120743-x 8 Stem Packing Ring M120832 M120842 M120843 9 Valve Body M120925 M120935 M120945 10 Gate Packing Buna N -1 Viton -2 M121023-x M121033-x M121043-x 11 Wear Plate nbsp; nbsp; Stainless Steel M121123 M121133 M121143 12 O-Ring Buna N -1 Viton -2 M121223-x M121233-x M121243-x 13 Thread Body Sub Regular Port - Weld nbsp;Sch.xxH -10 Sch.160 -11 Full Port Screwed nbsp; nbsp; nbsp; nbsp;LP -20 NUE -21 Flanged nbsp; nbsp; nbsp; Raised Face -30 RTJ -31 nbsp;M121323-xx M121333-xx M121343-xx 14 Body Cap M121425 M121435 M121445 15 Body Stud Bolt M121525 M121535 M121545 16 Body Stud Nut M121625 M121635 M121645 Field repair is simple with cost kept to a minimum. The valve features replaceable body subs that eliminate the expense of replacing valve bodies when connections can no longer be used. The full rising one-piece stainless steel gate and stem is machined with heavy-duty, small pitch threads assembled with a durable ball bearing that makes for quick and smooth operation. The oversized handwheel allows for tight shut-offs with the stem visible to show the user the gate position at a glance. Page 10/p

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