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Diaphragm Valve Series

UHP Products

Low Pressure Manual Diaphragm Valve (TDV2)

■ Weld tee & valve forged body type.
■ Used in sub-main or after of the bulk gas piping system.
■ Developed for low cost.
■ Simple and easy to use
■ Minimal contributions of Moisture, Oxygen and Hydrocarbon.
■ Component parts are reduced to minimum. 
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Major Specifications
Size 1/4″ 3/8″, 1/2″ 3/4″
Cv Value 0.3 0.7 0.7
Orifice Size 4.5mm 7.8mm 7.8mm
Max. Working Pressure (G.) 1MPa
Max. Working Temp. PCTFE : -10℃ ~ 80℃ / PI,PFA : -10℃ ~ 150℃
Internal Leakage Allowance (He)
Test Pressure ≤ 1×10-4 Torr
Holding Time ≥ 30 sec.
1x10-10Pa · m3/s
External Leakage Allowance (He)
Test Pressure ≤ 1×10-4 Torr
Holding Time ≥ 1 min.
1x10-10Pa · 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 Seat PCTFE / PI / PFA
3 Diaphragm Ni-Co Alloy
4 Handle HI-100
Ordering Number
MATERIAL SIZE CONNECTION GRADE
S 316L Stainless Steel 20×T4 20A×1/4″ VM MFS Male AP AP Grade
D 316L Stainless Steel Remelted 20×T6 20A×3/8″ VF MFS Female BLANK BA Grade
4S 304 Stainless Steel 20×T8 20A×1/2″ SW Lok P EP Grade
- - 20×T8 20A×1/2″ TW Butt Weld

MODEL CONNECTION SIZE A B C D E H
  MFS Male 1/4″ 98.5 11 66 17 45 113.5
3/8″ 121.5 16 77 28 45 138.5
1/2″ 121.5 16 77 28 45 138.5
3/4″ 158.9 22 77 28 45 172.5
  MFS Female 1/4″ 105.9 11 66 17 45 123.8
3/8″ 135.8 16 77 28 45 149.4
1/2″ 114.5 16 77 28 45 149.4
3/4″ 141.8 22 77 28 45 155.4
  Lok 1/4″ 105.9 11 66 17 45 112
3/8″ 117.5 16 77 28 45 131.1
1/2″ 118.5 16 77 28 45 132.1
3/4″ 155 22 77 28 45 168.6
  Butt Weld 1/4″ 138.4 11 66 17 45 152
3/8″ 157 16 77 28 45 170.6
1/2″ 157 16 77 28 45 170.6
3/4″ 155 22 77 28 45 168.6