DIAVAC LIMITED
Vacuum components

Clamp valve | L-type valve


Vacuum valve


Clamp valve

Hand-operating valve
Air-operating clamp valve
Manual 3-directional clamp valve
Air-operated clamp valve
Clamp valve of automatic leak type

•Features
Valve body and inner components are made of SUS with higher anti-corrosion.
Distance between flange faces are equal for each size, and their installation angle and posture are freely selectable.
Leak amount of body seal is 1.0 x 10 (Pa · m /s) or less.
Vacuum seal is made of fluoride rubber.



Manual clamp valve LCV-25, 40, 50

LCV-25
•Features
Two kinds of handles are prepared: one is quick lever system (for
LCV-25, 40), and the other hand-knob system (for LCV-50).
Quick lever system can be operated with one action and open and close with 225 degree rotation.
Installation angle of the handle can be freely adjustable at 90 degree pitch.

•Application :
Various vacuum lines

•Product specification
Model LCV-25 LCV-40 LCV-50
Nominal diameter 25 40 50
Conductance(L/s) 15 45 85
Leak volume at body seal part
(Pa•m3/s)
1.3 X 10-10
Pressure difference between
valve sheets (MPa)

0.1

Material

A: body; SUS-304 B: sealing part; fluoride rubber

Life cycle 100K cycles (at room temperature)
Baking temperature(ºC) 70
Mass(kg) 1.2 1.9 2.6
Exterior dimension drawing [PDF]  [DXF] [PDF]  [DXF] [PDF]  [DXF]
* Shaft seal of bellows spec. is available (LCVB-25, 40, 50)



Air-operating clamp valve LCAV-25, 40, 50

LCAV-25
•Features
Valve of automatic close/open action with compressed air through 5- boards and 2-positioned electromagnetic valve
Lead switch can be attached as an option (electromagnetic detection of close/open position of valve).

•Application :
various vacuum lines

•Product specification
Model LCAV-25 LCAV-40 LCAV-50
Nominal diameter 25 40 50

Conductance(L/)

15 45 85
Leak volume at body seal part
(Pa•m3/s)
1.3 X 10-10ȉ
Pressure difference between
valve sheets (MPa)

0.1

Material

A: body; SUS-304 B: sealing part; fluoride rubber

Compressed air pressure (MPa) 0.29 to 0.49
Life cycle 1M cycles (at room temperature)
Baking temperature(ºC) 70
Air-cylinder capacity (mL) 15 30 40
Mass (kg) 1.2 2.0 2.5
Exterior dimension drawing [PDF]  [DXF] [PDF]  [DXF] [PDF]  [DXF]
* Shaft seal of bellows spec. is available (LCAVB-25, 40, 50)



Manual 3-directional clamp valve: 3W-25, 40

3W-25
•Features
Clamping of valve disk with shaft prevents friction of sealing material, contrary to the case of ball valve.
Manual 3-directional valve allows rough evacuation, auxiliary evacuation, and operation of each valve to be done with one valve with 180 degrees rotation of handle, and switching between these operation can always be performed through the stop of an operation.

•Application :
Various vacuum lines

•Product specification
Model 3W-25 3W-40
Nominal diameter 25 40
Conductance (between C and R)
(L/s)
13 40

Conductance (between C and F)
(L/s)

7 23
Leak volume at body seal part
(Pam3/s)
1.3 x 10 or less
Pressure difference between
valve sheets (MPa)

0.1

Materia

A: body SUS-304 B: seal part fluoride rubber

Life cycle 100K cycles (at room temperature)
Mass (kg) 2.5 4.8
Exterior dimension drawing [PDF]  [DXF] [PDF]  [DXF]



Air-operated clamp valve 3AW-25, 40

3AW-25
•Features
Clamping of valve disk seal with shaft prevents friction of sealing material, contrary to the case of ball valve.
Air-operated 3-directional valve allows rough evacuation and auxiliary evacuation to be switched with compressed air through 2 units of 3-directional electromagnetic valves.
Optional installation of lead switch allows close/open position to be detected.

•Application :
Various vacuum lines

•Product specification
Model 3AW-25 3AW-40
Nominal diameter 25 40
Conductance (between C and R)
(L/s)
13 40

Conductance (between C and F)
(L/s)

7 23
Leak volume at body seal part
(Pa · m3/s)
1.3 x 10 or less
Pressure difference between
valve sheets (MPa)

0.1

Material

A: body SUS-304 B: seal part fluoride rubber

Life cycle 100K cycles (at room temperature)
Compressed air pressure (MPa) 0.29 to 0.49
Air-sealing capacity (mL) 20 40
Mass (kg) 2.7 5.1
Exterior dimension drawing [PDF]  [DXF] [PDF]  [DXF]



Clamp valve of automatic leak type: LCLV-25, 40, 50

LCLV-25
•Features
Automatic leak valve is co-related to startup and stop of rotary pump. At pump stopping, reversed flow of oil from pump side to pumping system side is prevented, and leak is done at pump side.

•Application :
For automatic leak at stoppage of rotary pump



connection example

•Product specification
Model LCLV-25 LCLV-40 LCLV-50
Nominal diameter 25 40 50

Conductance (L/s)

15 45 85
Leak volume at body seal part
(Pa•m3/s)
1.3 x 10 or less
Material

A: body SUS-304 B: seal part fluoride rubber

Life cycle 10K cycles (at room temperature)
Mass (kg) 1.8 2.8 3.7
Exterior dimension drawing [PDF]  [DXF] [PDF]  [DXF] [PDF]  [DXF]

•Electromagnetic valve specification
Service voltage DC  24V AC100V,50/60Hz
AC110V,60Hz
AC200V,50/60Hz
AC220V,60Hz

Power consumption (50/60Hz)

11W 6/4.2W
Connecting diameter 1/8B



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