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Bellows Seal Type Globe Valve

image of Bellows Seal Type Globe Valve

BELLOWS SEAL TYPE 2-WAY & 3-WAY GLOBE VALVE

Wasted material, employee safety, environmental concerns all good reasons for today’s plant operator to be concerned about fugitive emissions from hazardous processes.

To stop packing leakage from control valves.

Using a formed a formed metal bellows design with minimal welded joint, the design of PROVAL bellows has a full-cycles lift up to 5 a hundred thousands cycles.

This ensures years of safe and reliable operation in hazardous process ranging from -160°C(-230°F) ~ 350°C (688°F) and pressure to 40(kgf/cm²).

A metal should envelopes the bellows acting as a pressure boundary in service, allowing use of a single, pressurized gasket seal and preventing fluid contact with the bellows housing during normal operation.

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FEATURES

· Zero
Leakage stem & seal.
· Available with SUS316 or SUS316L bellows.
 
· No bellows tension
Bellows is in a relaxed state at valve’s closed position.
· No bellows erosion / fluid impingement
Bellows is out of flow stream.
· No special packing requirements
Uses standard PROVAL V-PTFE packing materials.
· Multiple temperature applications
Temperature range from -160°C ~ 350°C.

SPECIFICATION

Model No. 2-WAY YAD-12214 (RA Type), YAD-22214 (DA Type)
3-WAY YAD-12284 (RA Type), YAD-22284 (DA Type)
Valve Type Diaphragm or cylinder actuator operated bellows seal type globe valve.
BODY Valve
Size		 (mm) 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500
(inch) ½ ¾ 1 1 ¼ 1 ½ 2 2 ½ 3 4 5 6 8 10 12 14 16 18 20
Stroke (mm) 20 25 30 40 55 60 90 OVER 100
Pressure Rating ANSI 150# ~ 600# / JIS 10K ~ 40K / JPI 150# ~ 600# / PN 6bar ~ 40bar
End Connections Flanged end: FF, RF, RTJ, M/F(female), T/G(female) ※Welding end: SW, BW
Body Materials A216-WCB, A351-CF8, CF8M, CF3M
Bellows Materials SUS316, SUS316L
Operating
Temperature		 Standard Standard Type: -20°C ~ 300°C
Specials -160°C ~ 350°C
Gland Packing V-PTFE, PTFE yarn, Graphite yarn
Guiding Top & Bottom, Cage Guide.
Gasket SUS316 + Graphite spiral wound, other alloy steels.
Painting Color Standard is silver. In the case of stainless steel, flange is not painted.
Flow Direction 2-WAY FTO (Flow Action to Open)
3-WAY Diverting (AB→A, AB→B, Fail: AB→B)
Trim Materials SUS304 (STL.), SUS316 (STL.), SUS316L (STL.)
Treatment of Trim See “MATERIAL DATA” page 3, 4
PERFORMANCE Valve Action Direct action, Reverse action.
Allowable
Differential Pressure		 See “ALLOWABLE PRESSURE DROP” page 6
Rated Cv Value See “FLOW CHARACTERISTICS” page 4
Flow Characteristics See “FLOW CHARACTERISTICS” page 5
Rangeability See “FLOW CHARACTERISTICS” page 4
Allowable Seat
Leakage Ratio		 Standard 0.01% of rated Cv (ANSI B16. 104 Class IV)
※ Tight shut off: 0.002%
Specials Soft trim ANSI B16. 104 Class VI.
Action
Accuracy		 Hysteresis (Without positioner) max. 6% F.S.
(With positioner) max. 1.5% F.S.
Linearity (Without positioner) max. ±7% F.S.
(With positioner) max. ±1.5% F.S.
ACTUATOR Valve Size (mm) 15 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500
(inch) ½ ¾ 1 1 ¼ 1 ½ 2 2 ½ 3 4 5 6 8 10 12 14 16 18 20
Model A-220M ~ A-520M
Actuator Type Multi-spring diaphragm type.
Actuator Size
(Diaphragm Size)		 Ø220 Ø270 Ø360 Ø430 Ø520 Cylinder Type
Max. Stroke (mm) 20 20, 25 30, 40 55, 60 90 Over 100
Supply Air Pressure
kPa (kgf/cm²G)		 200 (2.0), 320 (3.2) -
Spring Range
kPa (kgf/cm²G)		 20~98 (0.2~1.0), 40~200 (0.4~2.0) -
Action Direct action, Reverse action.
Materials Diaphragm: EPDM, York: FCD450 & A216-WCB, Case: Al-Alloy
Air Connection Rc 1/4 Rc 3/8
Ambient Temperature -20℃ ~ +70°C (※-50°C ~ -20°C, +70°C ~ +100°C)
Painting Color Standard is Cobalt Blue(Munsell No : 2.5 PB3/10 ) [Request other color]

[Notes]
(1) Valve performance is represented under the condition of standard packing (V-PTFE).
(2) ※: Manufactured and attached as according to customer’s order.

DOCUMENTS & DRAWINGS

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