PDF《Safety and relief products》

Kunkle Models 6252/6254 safety valves Safety and relief products Features ? Heavy duty high quality cast iron construction with stainless steel semi-nozzle, trim and disc.

? Bolted bonnet design for easy maintenance. ? Seats lapped to optical flatness. ? Dual control rings offer easy adjustability for precision opening with minimum pre-open or simmer and exact blowdown control. ? Heavy duty lift lever assembly. ? All adjustments factory sealed to prevent tampering or disassembly. ? Each valve tested and inspected for pressure setting and leakage. ? Valves available National Board certified to ASME sections I, VIII and IV, and PED certified for non-hazardous gas. General application Suitable for use on steam boilers and generators, pressure reducing stations, reciprocating or rotary air/gas compressors and for pressure vessels including tanks, receivers, intercoolers, oil/gas separators and lines. www.pentair.com/valves ?

2012 Pentair plc. All Rights Reserved. VCTDS-00393-EN 16/03 Technical data Connections: FNPT or flanged Temperature range: -20° to 406°F (-29° to 208°C) Pressure range:

10 to

250 psig (0.7 to 17.2 barg) Code: ASME I, IV, VIII and PED Cast iron ASME section I steam and section VIII, air, steam and gas '

UV'

National Board certified safety valves including model

6254 to ASME section IV '

HV'

, PED certified for non-hazardous gas Note 1. ASME code valves made from cast iron A126 may not be used in lethal or flammable service. A S M E HV A S M E V A S M E UV

2 14

13 12

11 10

8 7

6 5

4 3

2 1

9 15

26 16

17 18

19 20

21 22

23 24

25 28

29 30 Kunkle Models 6252/6254 safety valves Safety and relief products Parts and materials Models overview Model 6252: Cast iron, enclosed spring, SS trim. Codes: ASME I, VIII and PED Model 6254: As model

6252 except certified for ASME code section IV - low pressure steam heating boilers. Set pressure

15 psig (1.0?barg) only. J through P orifice only. Codes: ASME IV and PED Notes 1. Not shown on assembly. 2. SS A313-631 for '

J'

orifice. 3. Brass B16-H02 for '

J'

orifice. 4. Applies only to gag option. Gag screw ships with valve, not installed. 5. SS-SA351-C8FM for '

Q'

and '

R'

orifice. 6. J and K orifices use

1 piece lever as shown in diagram. All other orifices use

2 piece design, lever and yoke. Yoke material: iron, A536

65 45 12. Models

6252 and

6254 No. Part name Material

1 Body Cast iron, A126 CL A or B

2 Semi nozzle SS, SA351 CF8M

3 Warn ring locking screw Brass, B16 H02

4 Warn ring locking pin SS, A582 TY

416 5 Guide Bronze, B584 C84400

6 Guide locking screw Brass, B16 H02

7 Guide locking pin SS, A582 TY

416 8 Stem end SS, A582 TY

416 9 Spring step Brass, B16 H02

10 Compression screw Brass, B16 H02

11 Lever6 Iron, A536

65 45

12 12 Compression screw lock nut SS, SA479

316 SS

13 Lifting disc nut Steel, A108

1018 14 Cap Iron, A536

65 45

12 15 Lifting disc SS, SA479

316 SS

16 Lever pin Steel, A108

1018 17 Lever pin washer Steel, A108

1018 18 Lever cotter pin Steel, A108

1018 19 Stem SS, A582 TY

416 20 Cap set screw Steel, A108

1018 21 Bonnet Cast iron, A126 CL A or B

22 Spring Steel, A229, aluminum coated2

23 Bonnet bolt Steel, A193-B7/194-7

24 Disc SS, SA479

316 SS5

25 Warn ring Bronze, B584-C844003

26 Gag screw4 Steel, A108

1018 27 Wire seal Lead seal, aluminum wire1

28 Retainer nut Brass, B16-H02