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KD Series: Low Pressure, High Flow Configuration

Features

  • Reduced inner capacity
    Minimizing the verticle hole to achieve 1.2cm3 of inner capacity (KD 1/4 inch male CVC type under valve open) adds excellent displacement features to this valve.
  • Minimal seat volume (0.066cm3)
    Reduction of seat surface (0.3cm2) that is in contact with gas enhances the degas features, which in consequence prevents the expansion of plastic caused by the material gases.
  • Increased seal surface (3.5 times more, compared with previous type of our own)
    Increased seal surface prevent internal leakage caused by mixing-in of foreign particles.
  • Diaphragm
    Using cobalt alloy of 500 series that is highly resistant to corrosion, and strict control of rolling process ensures a high durability of the product.
  • Increased operation speed
    Using aluminum as a material for piston increases the valve operation speed.
  • Spring washer structure
    Repulsion of spring water ensures the shut off of the fluid when the valve is closed.
  • Handle
    4 different types, i.e., 90° open/close with lock function, 180° /270° revolving shut off types are available.
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Major Specifications

Type (Size) KD2 (1/8 inch) KD4 (1/4 inch) KD8 (1/2 inch) KD12 (3/4 inch)

Cv Value

0.05

0.27

0.7

2.4

Internal Volume

0.22cm3

1.2cm3

6.6cm3

34.6cm3

Maximum Working Pressure

0.98MPa(G.) (142psig)

Maximum Working Temp

PCTFE:-10~42°C (14~108F)
PFA: Manual Valve-10~150°C,
Pneumatic Valve-10~120°C(500,000 repeats at 150°C, actual test)
PI:-10~150°C
Metal:-10~200°C

Operating Pressure

0.4~0.7MPa(G.) (60~100psig)

Internal Leakage Allowance

3X10-10Pa•m3/sec (3X10-9atm cc/sec)

5X10-10Pa•m3/sec

External Leakage Allowance

3X10-12Pa•m3/sec (3X10-11atm cc/sec)

5X10-10Pa•m3/sec

Cycle Life

Pneumatic Valve 2 mil. repeats (N2 charged, own test)
Manual 100,000 repeats (N2 charged, own test)

30,000 repeats
(N2 charged, own test)