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Bellows Valve Series

TK-FUJIKIN Bellows Valves are available in variety of models for system versatility and designed to meet UHP system requirements.
Major features of bellows valve offers a long life cycle, excellent purification and minimum particle generation, due to stem support that is located in the outer part, preventing the fiction between the components.
TK-FUJIKIN can provide 4 different types based on the product configuration,
such as Miniature, Forged, Casting and Y-Type bellows valve.

Low Pressure Manual Bellows Valve (BV)

■ Minimize the dead space.
■ Installation can be made either panel-mount or bottom-mount.
■ Handle with open/close indicator is standardized. 
010-Low Pressure Manual Bellows Valve (STD TYPE).gif
Major Specifications
Size 1/4″ 3/8″, 1/2″ 3/4″
Cv Value 0.36 1.1 2.6
Orifice Size 4.5mm 8mm 12mm
Max. Working Pressure (G.) 1MPa
Max. Working Temp. PCTFE : -10℃ ~ 80℃ / PI : -10℃ ~ 150℃
Internal Leakage Allowance (He)
Test Pressure ≤ 1×10-2 Torr
Holding Time ≥ 30 sec.
4x10-10Pa · m3/s
External Leakage Allowance (He)
Test Pressure ≤ 1×10-2 Torr
Holding Time ≥ 1 min.
4x10-10Pa · m3/s
Particle Inspection (EP only)
Pressure : 60~80psi N2 Gas
Sample Volume : 1CFM
0.1㎛ and Larger
No count
Product Grade
GRADE AP BA EP
Inner
Surface
Roughness
Ry ≤ 25㎛
Cut off Length : 2.5mm
Measuring Length : 12.5mm
Ry ≤ 3.0㎛
10 μinch Ra(Avg.)
Cut off Length : 0.8mm
Measuring Length : 4mm
Ry ≤ 0.7㎛
5 μinch Ra(Avg.)
Cut off Length : 0.25mm
Measuring Length : 1.25mm
Polishing Machining Finish Machining Finish Electro Polishing Finish
Material
NO. NAME MATERIAL
1 Body 316L Stainless Steel
316L Stainless Steel Remelted
304 Stainless Steel
2 Disk PCTFE / PI
3 Bellows Stainless Steel 316L
4 Handle 1/4″ ~ 1/2″ : HI-100, 3/4″ : ALUMINUM
Ordering Number
MATERIAL SIZE CONNECTION OPTION GRADE
S 316L Stainless Steel 4 1/4″ VM MFS Male ×259 PI Disk AP AP Grade
D 316L Stainless Steel Remelted 6 3/8″ VF MFS Female - - BLANK BA Grade
4S 304 Stainless Steel 8 1/2″ SW Lok - - P EP Grade
- - 12 3/4″ TW Butt Weld - - - -

MODEL CONNECTION SIZE A B C D E F G H J L
MFS Male 1/4″ 58 14 79 45 23 25 30 2 18.5 -
3/8″ 60 16 85 45 23 25 36.5 2 18.5 -
1/2″ 60 16 85 45 23 25 36.5 2 18.5 -
3/4″ 125 22 124 65 32 33 58 6 24 -
MFS Female 1/4″ 70.5 14 79 45 23 25 30 2 18.5 -
3/8″ 90 14 85 45 23 25 36.5 2 18.5 -
1/2″ 90 14 85 45 23 25 36.5 2 18.5 -
3/4″ 115 22 124 65 32 33 58 6 24 -
Lok 1/4″ 50 14 79 45 23 25 30 2 18.5 64
3/8″ 63 14 85 45 23 25 36.5 2 18.5 78
1/2″ 63 14 85 45 23 25 36.5 2 18.5 83.5
3/4″ 80 22 124 65 32 33 58 6 24 101
Butt Weld 1/4″ 150 14 85 45 23 25 36.5 2 18.5 -
3/8″ 150 14 85 45 23 25 36.5 2 18.5 -
1/2″ 150 14 85 45 23 25 36.5 2 18.5 -
3/4″ 158 22 124 65 32 33 58 6 24 -