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Adjustment Ranges
High Pressure Pilot (SCRL-60)
0 to 75 pis
20 to 200 psi*
100 to 300 psi
250 to 600 psi
Low Pressure Pilot (SCRA)
2 to 30 psi
15 t0 75 psi
30 to 300 psi*
*Supplied unless otherwise specified
Other ranges available, please consult factory
Temperature range
Water: to 180°F
Materials
Standard Pilot System Materials
Pilot Control: Low Lead Bronze
Trim: Stainless Steel 303
Rubber: Buna-N® Syntheitc Rubber
Optional Pilot System Materials
Pilot systems are available with optional
Aluminum, Stainless Steel or Monel materials.
1. Catalog No. 52-01
2. Valve Size
3. Pattern-Globe or Angle
4. Pressure Glass
5. Threaded or Flanged
6. Trim Material
7. Adjustment Range
8. Desired Options
9. When Vertically Installed
DESCRIPTION
The sCR Apressure Reducing control automatically reduces a higher inlet pressure to a lower outlet pressure. It is a direct acting, spring loaded, diaphragm type valve that operates hydraulically or pneumatically and is designed to sense pressure from a remote point. It may be used as a self-contained valve or as a pilot control for a SHSUOTE Co. main valve. It will hold a constant downstream pressure at the remote sensing point within very close pressure limits.
OPERATION
The SCRA Pressure Reducing Control is normally held open by the force of the compression spring above the diaphragm; delivery pressure acts on the underside of the diaphragm. Flow through the valve responds to changes in pressure at the sensing point.
INSTALLATION
The SCRA Pressure Reducing Control may be installed in any position. There is one inlet port and two outlets, for either straight or angle installation. The second outlet port can be used for a gauge connection. A flow arrow is marked on the body casting.
ADJUSTMENT PROCEDURE
The SCRA Pressure Reducing Control can be adjusted to provide a delivery pressure range as specified on the name plate.
Pressure adjustment is made by turning the adjustment screw to vary the spring pressure on the diaphragm. The greater the compression on the spring the higher the pressure setting.
1 .Turn the adjustment screw in (clockwise) to increase delivery pressure.
2 .Turn the adjustment screw out (counter-clockwise) to decrease the delivery pressure .when pressure adjustment is completed, tighten jam nut on adjustment screw and replace protective cap.
Flow rates are not critical during pressure setting. The approximate minimum flow rates given in the table are for the main valve on which the SCRA is installed.
Valve Size | 1 1/4"-3" | 4"-8" | 10"-16" |
Minimum Flow GPM | 15-30 | 50-200 | 300-650 |
MAINTENANCE
Disassembly
To disassemble follow the sequence of the item numbers assigned to
parts in the sectional illustration.
Reassembly
Reassembly is the reverse of disassembly. Caution must be taken to
avoid having the yoke (17) drag on the inlet nozzle of the body (18).
Followthis procedure:
1. Place yoke (17) in body and screw the disc retainer assembly (16) until it bottoms.
2. Install gasket (14) and spring (19) for 2-30 psi range onto plug (13) and screw into body. Disc retainer must enter guide hole in plug as it is assembled. Screw the plug in by hand. Use wrench to tighten only.
3. Place gasket (25) and powertrol body (21) on yoke extension (17) .Refer to sectional view for proper reassembly of (21) onto body (18).
4. Place lower diaphragm washer (24) ,"o" ring (22) ,diaphragm (12), upper diaphragm washer (11) , and belleville washer (20) on yoke extension (17) . Screw on diaphragm nut (10) finger tight.
5. Place two machine screws (4) through (21) (25) and screw into body (18). Do not include the diaphragm (12) in this operation.
This holds parts aligned for next step,and allows the diaphragm to move and be properly located during tightening of nut (10)
6 .Hold the diaphragm so that screw holes in the diaphragm (12) and powertrol body (21) align. Tighten diaphragm nut (10) with a wrench.
At the final tightening release the diaphragm and permit it to rotate approximately 5° to 10° .The diaphragm holes should now be properly
aligned with the body holes
To check for proper alignment proceed as follows:
Rotate diaphragm clockwise and counterclockwise as far as possible.
Diaphragm screw holes should rotate equal distance on either side of
powertrol body screw holes±1/8".
Repeat assembly procedure until diaphragm and yoke are properly aligned. There must be no contact between yoke and body nozzle during its normal opening and closing movement. To simulate this movement hold powertrol body and diaphragm holes aligned. Move yoke to open and closed positions. There must be no evidence of contact or dragging.
7. Remove machine screws per step5.
8. Install spring (9) with spring guide (8) on top of spring.
9. Install cover (5) using eight machine screws(4).
10. Replace adjusting screw (2) and nut (3), then cap(1).
DESCRIPTION
The SCRL Pressure Relief control is a direct acting, spring loaded, diaphragm type relief valve. lt may be used as a self-contained valve or as a pilot control for a SHSUOTE Main valve. It opens an closes within very close pressure limits.
INSTALLATION
The SCRL Pressure Relief Control may be installed in any position. The control body (7) has one inlet and one outlet port with a side pipe plug (24) at each port.These plugs are used for control connections or gauge applications. The inlet in the power unit body (6) is the sensing line port. A flow arrow is marked on the body casting.
OPERATION
The SCRL pressure Relief control is normally held closed by the force of the compression spring above the diaphragm; control pressure is applied under the diaphragm. when the controlling pressure exceeds the spring setting, the disc is lifted off its seat, permitting flow through the control.
When controlling pressure drops below spring setting, the spring returns the control to its normally closed position.
ADJUSTMENT PROCEDURE
The SCRL Pressure Relief control can be adjusted to provide a relief setting at any point within the range found on the name plate.
Pressure adjustment is made by turning the adjustment screw (9) to vary the spring pressure on the diaphragm. Turning the adjustment screw clockwise increases the pressure required to open the valve. Counterclockwise decreases the pressure required to open the valve.
When pressure adjustments are complete the jam nut (10) should be tightened and the protective cap (1) replaced. If there is a problem of tampering, lock wire holes have been provided in cap and cover. Wire the cap to cover and secure with lead seal.
DISASSEMBLY
The SCRL Pressure Relief COntrol does not need to be removed form the line for disassembly. Make sure that pressure shut down is accompanied prior to disassembly. Make sure that pressure shutdown is accompanied prior to disassembly. lf the SCRL is removed from the line for disassembly be sure to use a soft jawed vise to hold body during work.
Refer to parts List Drawing for Item Numbers.
1. Remove cap (1), loosen jam nut (10) and turn adjusting screw counter clockwise until spring tension is relieved.
2. Remove the eight screws (4) holding the cover (3) and power unit body (6). Hold the cover and power unit together and place on a suitable work surface.
See NOTE under REASSEMBLY.
3. Remove the cover (3) from power unit body(6 ).The spring (12) and two spring guides (11).
4. Remove nut (13) from stem(19) and slide off the belleville washer (14), the upper diaphragm washer (15) and the diaphragm (16).
5. pull the stem(19) with the disc retainer assembly (21) through the bottom of power unit.The lower diaphragm washer (17) will slide off of stem top.
6. Remove jam nut (23) and disc retainer assembly (21) from stem. use soft jawed pliers or vise to hold stem. The polished surface of stem must not be scored or scratched.
7. The seat (22) need not be removed unless it is damaged. lf removal is necessary use proper size socket wrench and turn counterclockwise
Note: some models have an integral seat in the body (7).
INSPECTION
Inspect all parts for damage, or evidence of cross threading. Check diaphragm and disc retainer assembly for tears, abrasions or other damage. Check all metal parts for damage, corrosion or excessive wear.
REPAIR AND REPLACEMENT
Minor nicks and scratches may be polished out using 400 grit wet or dry sandpaper fine emery or crocus cloth. Replace all O-rings and any damaged parts. When ordering replacement parts, be sure to specify parts list item number and all nameplate data.
REASSEMBLY
In general, reassembly is the reverse of disassembly. However, the following steps should be observed:
1. Lubricate the O-Ring (18) with a small amount of a good grade of waterproof grease, (Dow Corning 44 medium grade or equal). Use grease sparingly and install O-ring in powerunit body(6).
2. Install stem (19) in powerunit body (6). Use a rotating motion with minimum pressure to let stem pass through O-ring.
DO Not Cut O-Ring.
3. Install O-ring (5) at top of stem (19). Place lower diaphragm washer (17) on the stem with the serrated side up.Position diaphragm (16) upper diaphragm washer (15) ,with serration down and belleville washer(14) with concave side down.
4. Position powerunit body (6) as shown on parts list drawing (top view).
5. Continue reassembly as outlined in disassembly steps 1 through 3.
Note: Item (4) Screw will have a quantity of 8 for the 0-75 and 20-200 psi design and a quantity of 4 for the 100-300 psi. Item (25) Screw is used on the 100-300 psi design only. Install item (25), before item (4) for preload of item (12) spring.
1. Test:
1.1 Sealing test
Low pressure: 0.5ba;
High pressure:1 1xPN bar;
1.2 Shell test
15xPN bar
2. Flange dimension can be according to order;
3. If need optional material or others consult factory.
Technical Specification
1. Design & Manufacture: BS EN 1074-5
2. Face to Face Standard: BS EN 558-1
3. Range ends Standard: ASME B16.5
4. Test inspection: BS EN 12266-1
Unit:mm
NPS | L | DN | ΦD | ΦK | N-Φd | C | H |
2” | 230 | 50 | 152 | 120.6 | 4-Φ19 | 19 | 177 |
21/2” | 290 | 65 | 178 | 139.7 | 4-Φ19 | 22.1 | 202 |
3” | 310 | 80 | 190 | 152.4 | 4-Φ19 | 23.9 | 219 |
4” | 350 | 100 | 229 | 190.5 | 8-Φ19 | 23.9 | 243 |
5” | 400 | 125 | 254 | 215.9 | 8-Φ22.5 | 23.9 | 243 |
6” | 480 | 150 | 279 | 241.3 | 8-Φ22.5 | 25.4 | 333 |
8” | 600 | 200 | 343 | 298.4 | 8-Φ22.5 | 28.4 | 428 |
10” | 730 | 250 | 406 | 362 | 12-Φ26 | 29.9 | 478 |
12” | 850 | 300 | 484 | 431.8 | 12-Φ26 | 31.7 | 538 |
14” | 980 | 350 | 533 | 476.2 | 12-Φ28.5 | 34.8 | 550 |
No | Part Name | Material | Standard |
1 | Body | Ductlie lron | GJS 500-7 |
2 | Seat | Stainless Steel | AlSI 304/316 |
3 | O-ring | Rubber | NBR |
4 | 0-ring | Rubber | NBR |
5 | Bolt | Stainless Steel | A2/A4 |
6 | Washer | Stainless Steel | A2/A4 |
7 | Bonnet | Ductile lron | GJS 500-7 |
8 | Bush | Bronze | C61900 |
9 | Spring | Stainless Steel | AISI 304/316 |
10 | Caulking Nut | Stainless Steel | A4 |
11 | Diaphragm | Nylon Reinforced Rubber | EPDM +Nylon Fabric |
12 | Fixing holder | Ductlie lron | GJS 500-7 |
13 | Disc Holder | Ductlie lron | GJS 500-7 |
14 | Sed | Rubber | EPDM |
15 | Seat Refainer | Stainless Steel | AISI 304/316 |
16 | Stem | Stainless Steel | AISI 304/316 |
17 | Plug | Stainless Steel | AISI 304/316 |
18 | Screw | Stainless Steel | A2/A4 |
19 | Plug | Stainless Steel | A2/A4 |
20 | Washer | Stainless Steel | A2/A4 |
Main Valve Globe type Fully bore Flange 2~14” | SE-SUOTE-BS-S900-2-14-CL150-V1 |
Shang hai SHUOTE Valve Co.,Ltd. | 2023.5.16 |
1. Test:
1.1 Sealing test
Low pressure:0.5bar;
High pressure:1.1xPN bar;
1.2 Shell test
1.5xPN bar
2. Flange dimension can be according to order;
3. lf need optional material or others consult factory.
Technical Specification
1. Design & Manufacture: BS EN 1074-5
2. Face to Face Standard: BS EN 558-1
3. Flange ends Standard: IS07005-2
4. Test Inspection: BS EN 12266-1
Unit:mm
DN | L | H | ΦD | ΦK | N-Φd | ΦB | C | f | ||||||||||||
PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | |||
50 | 230 | 177 | 165 | 165 | 165 | 125 | 125 | 125 | 4-Φ19 | 4-Φ19 | 4-Φ19 | 99 | 99 | 99 | 19 | 19 | 19 | 3 | 3 | 3 |
65 | 290 | 202 | 185 | 185 | 185 | 145 | 145 | 145 | 4-Φ19 | 4-Φ19 | 8-Φ19 | 118 | 118 | 118 | 19 | 19 | 19 | 3 | 3 | 3 |
80 | 310 | 219 | 200 | 200 | 200 | 160 | 160 | 160 | 8-Φ19 | 8-の19 | 8-Φ19 | 132 | 132 | 132 | 19 | 19 | 19 | 3 | 3 | 3 |
100 | 350 | 243 | 220 | 220 | 235 | 180 | 180 | 190 | 8-Φ19 | 8-Φ19 | 8-Φ23 | 156 | 156 | 156 | 19 | 19 | 19 | 3 | 3 | 3 |
125 | 400 | 243 | 250 | 250 | 270 | 210 | 210 | 220 | 8-Φ19 | 8-Φ19 | 8-Φ28 | 184 | 184 | 184 | 19 | 19 | 19 | 3 | 3 | 3 |
150 | 480 | 333 | 285 | 285 | 300 | 240 | 240 | 250 | 8-Φ23 | 8-Φ23 | 8-Φ28 | 211 | 211 | 211 | 19 | 19 | 20 | 3 | 3 | 3 |
200 | 600 | 428 | 340 | 340 | 360 | 295 | 295 | 310 | 8-Φ23 | 12-Φ23 | 12-Φ28 | 266 | 266 | 274 | 20 | 20 | 22 | 3 | 3 | 3 |
250 | 730 | 478 | 395 | 405 | 425 | 350 | 355 | 370 | 12-Φ23 | 12-Φ28 | 12-Φ31 | 319 | 319 | 330 | 22 | 22 | 24.5 | 3 | 3 | 3 |
300 | 850 | 538 | 445 | 460 | 485 | 400 | 410 | 430 | 12-Φ23 | 12-Φ28 | 16-Φ31 | 370 | 370 | 389 | 24.5 | 24.5 | 27.5 | 4 | 4 | 4 |
350 | 980 | 550 | 505 | 520 | 555 | 460 | 470 | 490 | 16-Φ23 | 16-Φ28 | 16-034 | 429 | 429 | 448 | 24.5 | 26.5 | 30 | 4 | 4 | 4 |
No. | Part Name | Material | Standard |
1 | Body | Ductlie lron | GJS 500-7 |
2 | Seat | Stainless Steel | AISI 304/316 |
3 | 0-rino | Rubber | NBR |
4 | O-ring | Rubber | NBR |
5 | Bolt | Stainless Steel | A2/A4 |
6 | Washer | Stainless Steel | A2/A4 |
7 | Bonnet | Ductite lron | GJS 500-7 |
8 | Bush | Bronze | C61900 |
9 | Spring | Stainless Steel | AISI 304/316 |
10 | Caulking Nut | Stainless Steel | A4 |
11 | Diaphragm | Nylon Reinforced Rubber | FPDM +Nylon Fabric |
12 | Fixing holder | Ductlie lron | GJS 500-7 |
13 | Disc Holder | Ductlie lron | GJS 500-7 |
14 | Seal | Rubber | EPDM |
15 | Seat Retainer | Stainless Steel | AlSI 304/316 |
16 | Stem | Stainless Steel | AlSI 304/316 |
17 | Plug | Stainless Steel | AISI 304/316 |
18 | Screw | Stainless Steel | A2/A4 |
19 | Plug | Stainless Steel | A2/A4 |
20 | Washer | Stainless Steel | A2/A4 |
Main Valve Globe type Fully bore Flange DN50-350 | SE-AFC-BS-A900-50-350-10-V1 |
Shang hai SHUOTE Valve Co,Ltd | 2022 |
Technical Specification
1.Design & Manufacture: BS EN 1074-5
2. Fce to Face Standard: BS EN 558-1
3. Flange ends Standard: IS07005-2
4.Test Inspection: BS EN 12266-1
Note:
1. Test:
1.1 Sealing test
Low pressure:0.Sbar;
High pressure:1.1xPN bar;
1.2 Shell test
1.5xPN bar
2. Flange dimension can be according to order;
3. lf need optional material or others consult factory.
Unit:mm
DN | L | H | ΦD | ΦK | N-Φd | ΦB | C | f | ||||||||||||
PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | PN10 | PN16 | PN25 | |||
400 | 1100 | 710 | 565 | 580 | 620 | 515 | 525 | 550 | 16-Φ28 | 16-Φ31 | 16-Φ37 | 480 | 480 | 503 | 24.5 | 28 | 32 | 4 | 4 | 4 |
450 | 1200 | 720 | 615 | 640 | 670 | 565 | 585 | 600 | 20-Φ28 | 20-Φ31 | 20-Φ37 | 530 | 548 | 548 | 25.5 | 30 | 34.5 | 4 | 4 | 4 |
500 | 1250 | 822 | 670 | 715 | 730 | 620 | 650 | 660 | 20-Φ28 | 20-Φ34 | 20-Φ37 | 582 | 609 | 609 | 26.5 | 31.5 | 36.5 | 4 | 4 | 4 |
600 | 1450 | 885 | 780 | 840 | 845 | 725 | 770 | 770 | 20-Φ31 | 20-Φ37 | 20-Φ40 | 682 | 720 | 720 | 30 | 36 | 42 | 5 | 5 | 5 |
700 | 1650 | 910 | 895 | 910 | 960 | 840 | 840 | 875 | 24-Φ31 | 24-Φ37 | 24-043 | 794 | 794 | 820 | 32.5 | 39.5 | 46.5 | 5 | 5 | 5 |
800 | 1850 | 1260 | 1015 | 1025 | 1085 | 950 | 950 | 990 | 24-Φ34 | 24-Φ40 | 24-049 | 901 | 901 | 928 | 35 | 43 | 51 | 5 | 5 | 5 |
900 | 2050 | 1260 | 1115 | 1125 | 1185 | 1050 | 1050 | 1090 | 28-Φ34 | 28-Φ40 | 28-Φ49 | 1001 | 1001 | 1028 | 37.5 | 46.5 | 55.5 | 5 | 5 | 5 |
1000 | 2250 | 1260 | 1230 | 1255 | 1320 | 1160 | 1170 | 1210 | 28-Φ37 | 28-Φ42 | 28-Φ56 | 1112 | 1112 | 1140 | 40 | 50 | 60 | 5 | 5 | 5 |
1200 | 2350 | 1630 | 1455 | 1485 | 1530 | 1380 | 1390 | 1420 | 32-Φ40 | 32-Φ49 | 32-Φ56 | 1328 | 1328 | 1350 | 45 | 57 | 69 | 5 | 5 | 5 |
No | Part Name | Material | Standard |
1 | Body | Ductlie lron | GJS 500-7 |
2 | Seat | Stainless Steel | AISI 304/316 |
3 | Screw | Stainless Steel | A2/A4 |
4 | Screw | Stainless Steel | A2/A4 |
5 | Screw | Stainless Steel | A2/A4 |
6 | Spring | Stainless Steel | AISI 304/316 |
7 | Bonnet | Ductile Iror | GJS 500-7 |
8 | Bush | Bronze | C61900 |
9 | 0-rinc | Rubber | NBR |
10 | Fix Washer | Bronze | C61900 |
11 | Diaphragm | Nylon Reinforced Rubber | EPDM +Nylon Fabric |
12 | Eye Bolts | Carbon Steel | 1040 |
13 | Fixing Holder | Ductlie Iron | GJS 500-7 |
14 | Disc Holder | Ductlie Iron | GJS 500-7 |
15 | Sed | Rubber | EPDM |
16 | Sedl Retainer | Ductile Iron | GJS 500-7 |
17 | Stem | Stainless Steel | AISI 304/316 |
18 | Plug | Stainless Steel | AISI 304/316 |
19 | 0-rinc | Rubber | NBR |
20 | Cap | Ductlie lron | GJS 500-7 |
21 | Plug | Stainless Steel | AISI 304/316 |
22 | Screw | Stainless Steel | A2/A4 |
23 | O-ring | Rubber | NBR |
24 | Screw | Stainless Steel | A2/A4 |
Main Valve Globe type Fully bore Flange DN40O-1200 | SE-AFC-BS-A900-400-1200-10-V1 |
Shang hai SHUOTE Valve Co,Ltd | 2022 |