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BELLOWS SEAL VALVE

BELLOWS SEAL VALVE

OPERATIONAL SERVICE FEATURES

In a maintenance aspect, it is true that this type of valve is accounted less than any other type, but the valve have some important advantages as follows:
1.Useful life is ensured.
2.There is a grease nipple on all bellows seal gate valve under current production to ensure correct lubrication over yoke bush.
The threads on stem in every kind of bellows seal valve should be kept clean if possible and lubricated periodically with high temperature grease.
It is recommended the preventive maintenance should be carried out at least every three months.
The maintenance has a particular importance when the valve is employed to high temperature application in case it is essential to use a grease of high temperature type.
At this time, it is desirable that the valve is operated from open to shut, and vice versa.

  • valve_selection
  • VALVE SELECTION

    As a general guide to valve selection suitable for a specific application, the gate valve should be used mainly for low or medium pressure steam, steam tracing lines, or other services such as heat transfer.
    The globe valve should be selected for medium or high pressure steam, where the isolation of vessels may be involved in safety problem. It is also used for toxic or explosive media handling and in every case that a trouble may occur in flow regulation.
    It should be noted that we have a specially designed valve of which dry escape to gas or fluid is completely prevented. In the valve, conventional stem packing is replaced with flexible metallic membrane where all possible leaking paths through stem or body/bonnet joint are welded.
    The bellows units applied to this valve were tested for life cycle to destruction, resulting in satisfactory test results meeting the life time, temperature, and pressure requirements of ASME B16.34.

LOW FUGITIVE EMISSION VALVE

Low Fugitive emission Valve (LFV) is designed and manufactured to ensure leakage of less than 100 ppm of volatile organic compounds. PK Valve has established the test facilities and made its own procedures with Emission Defence Packing (EDP) for fugitive emission test. By using the test facilities and procedures, room temperature cycle and thermal cycle testing have been performed, establishing critical design parameters necessary to achieve low fugitive emissions.

PRODUCTION MATERIALS
  • Bellows Set : 321SS(Bellows) + 316SS(Holder)
  • Carbon Steel : ASTM A216-WCB or Equivalent
  • Stainless Steel : ASTM A351-CF8, CF8M, CF3, CF3M or Equivalent
  • ASME SA designation material(e.g. ASME SA351-CF8M)

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UNIT : NPS
class/type 150 300 600
GATE 2-24 2-24 2-24
GLOBE 1/2-24 1/2-24 2-24
valve_selection
GATE VALVE / GLOBE VALVE
  • GATE VALVE

    GATE VALVE

  • GLOBE VALVE

    GLOBE VALVE

GATE VALVE

APPLICABLE STANDARD SPECIFICATION
  • BELLOWS INSPECTION AND TEST : MSS-SP-117
  • END FLANGE : ASME B16.10
  • BUTT WELDING ENDS : ASME B16.25
  • SHELL WALL THICKNESS : ASME B16.34 OR API 600
  • FACE TO FACE : ASME B 16.10
DIMENSION AND WEIGHT

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CLASS 150

UNIT : mm

SIZE 2 3 4 5 6 8
L 177.8 203.2 228.6 254.0 266.7 292.1
D 200 224 355 315 355 400
H 639 890 1272 1141 1209 1588

CLASS 300

UNIT : mm

SIZE 2 3 4 5 6 8
L 215.9 282.4 304.8 381.0 403.4 419.1
D 200 224 355 315 355 400
H 639 890 1272 1141 1209 1588

CLASS 600

UNIT : mm

SIZE 3 4
L 355.6 431.8
D 250 355
H 974 1272
STANDARD MATERIAL SPECIFICATIONS

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NO. PART NAME MATERIAL
1 BODY A216 - WCB
2 YOKE A216 - WCB
3 WEDGE A217 - CA15+STL
4 STEM A479 - 410
5 HAND WHEEL A197
6 BODY SEAT RING A576 - 1020+STL(S20C)
7 BELLOWS STAINLESS STEEL TYPE321+316
8 GASKET SPIRAL WOUND / GRAPHITE+304+304
9 PACKING GRAPHITE+GRAPHITE WITH INCONEL WIRE
10 GLAND FLANGE A283 - D
11 HINGE BOLT A307 - B
12 HINGE NUT A194 - 2H
13 HINGE PIN A576 - 1020
14 PACKING GLAND A576 - 1020+Cr
15 BONNET BOLT A193 - B7
16 BONNET NUT A194 - 2H
17 YOKE CAP A576 - 1020
18 YOKE SLEEVE A439 - D2C
19 HANDLE NUT A47 - 32510+Zn
20 SET SCREW STEEL
21 NIPPLE STEEL+Cr
22 FLANGE A216 - WCB
23 EXTENSION PIPE A106 - B

GLOBE VALVE

APPLICABLE STANDARD SPECIFICATION
  • BELLOWS INSPECTION AND TEST : MSS-SP-117
  • END FLANGE : ASME B16.10
  • BUTT WELDING ENDS : ASME B16.25
  • SHELL WALL THICKNESS : ASME B16.34 OR API 600
  • FACE TO FACE : ASME B 16.10
DIMENSION AND WEIGHT

좌우로 스크롤해서 확인하세요.

CLASS 150

UNIT : mm

SIZE 2 2½ 3 4 5 6 8 10
L 203.2 215.9 241.3 292.1 355.6 406.4 495.3 622.3
D 200 200 224 355 400 450 560 560
H 413 378 432 579 670 773 945 1208

CLASS 300

UNIT : mm

SIZE 2 2½ 3 4 5 6 8 10
L 266.7 292.1 317.5 355.6 400.1 444.5 558.8 622.3
D 200 200 224 355 400 450 560 560
H 364 378 432 569 670 773 945 1213

CLASS 600

UNIT : mm

SIZE 2½ 3
L 330.2 355.6
D 355 355
H 576 583
STANDARD MATERIAL SPECIFICATIONS

좌우로 스크롤해서 확인하세요.

NO. PART NAME MATERIAL
1 BODY A216 - WCB
2 BONNET A216 - WCB
3 DISC A216 - WCB+STL
4 STEM A479 - 410
5 HAND WHEEL A216 - WCB
6 BODY SEAT A216 - WCB+STL
7 BELLOWS SET STAINLESS STEEL TYPE321+316
8 GASKET SPIRAL WOUND / GRAPHITE+304+304
9 PACKING GRAPHITE+GRAPHITE WITH INCONEL WIRE
10 GLAND FLANGE A105
11 HINGE BOLT A307 - B
12 HINGE NUT A194 - 2H
13 PACKING GLAND A576 - 1020+Cr
14 BONNET BOLT A193 - B7
15 BONNET NUT A194 - 2H
16 YOKE A283 - D
17 YOKE SLEEVE A439 - D2C
18 YOKE CAP A576 - 1020
19 STOPPER A216 - WCB
20 BOLT A307 - B
21 NUT A563 - A
22 HAND WHEEL NUT A47 - 32510+Zn