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The two standard material are single melt material and vacuum double melt material.
Dimensional tolerances are held to minimum by precision machining.
After precision washing, fittings are sealed in high purity nitrogen gas and vacuum double packed in the clean room.

VTF fittings with the metal gasket seal are high performance seal fittings for high purity piping adaptable for a wide range from ultra high vacuum to high pressure and from low temperature to high temperature.
Installing and removing can be performed with minimum clearance.
The inside surface of the nut is silver plated and lubricant treated to prevent seizing of threads and reduce tightening torque.
To prevent the tube from rotating when the female nut is being tightened as well as to reduce torque, thrust washer (VSTW) and thrust bearing (VTJR) are available.
Weld parts are made of SUS316L which is precision machine to a high precision.
For customers requiring higher ultra purity and high degree of cleanliness, vacuum double melt material, W melt (VIM + VGAR) material, which contains little impurities such as Mn and minimal non-metal inclusion are available as standard material.
VTF fittings are individually vacuum packed in the clean room after being precision washed and protection applied to the fitting seals.
Product package shall be labeled with an identification label containing type description, control symbol and internal roughness grade.

High quality to satisfy the performance of the double ferrule
BI-Lok® tube fitting is composed of four parts: body, front ferrule back ferrule and nut. The major difference of the double ferrule type tube fitting from the bite type fittings is that the front ferrule made of corrosion resistant material is compressed against the body and tube to perform sealing of the fluid in the tube while the back ferrule with the edge hardened to a hardness higher than the tube surface bites slightly into the tube as it is compressed against the tube to prevent the tube from slipping out. The function of the two ferrules are thus differentiated.
This mechanism is performed by first the front ferrule deforming as it advances along the tapered surface of the body when the nut is being tightened by a wrench from the finger tight position which completes the sealing function, and followed by the back ferrule deforming and being compressed strongly against the tube surface as it advances along the taper on the rear edge of the first ferrule. Tightening is completed by one and one quarter turn (for sizes over 1/4OD and 6 mm) of the nut with the wrench from the finger tight position.
In order to satisfy this function uniform quality such as material, heat treatment and precision machining are indispensable. We are capable of supplying such safe and reliable products by our quality system which is based on the acquisition of ISO 9001.
Wide range of products available with the unique production system
With the unique production system that is applicable for small lot production of limited products, we are able to have a line up of a wide range of various products that cannot be made matched by other manufacturers. Tubes that are adaptable are inch and metric size series and schedule tubes, and their combination. These tubes can be assembled to various types of connection threads including NPT, UNF (JIS, R, Rc, G). Please consult us for custom made products not listed in the tables.

BALL VALVE

Can be selected in accordance with the application pressure from vacuum to 30 MPa.
Can be selected in accordance with the various types of fluid. Oil free specification is also available.
Non-standard connection can also be made upon request.

STOP VALVE

Can be selected in accordance with the application pressure up to 24.5 MPa.
Available from high temperature (VH) to low temperature (VC) applications.
Non-standard connection can also be made upon request.

BELLOWS VALVE

As the bellows completely shut off and seal the inside from the outside, there is absolutely no leakage from the gland.
Ideal for safety control in the prevention against toxic gas leakage and radiation and also in the prevention of public hazards such as offensive odor.
With no impurities from the outside becoming mixed, the quality of high purity fluid can be retained.
From small bore to large bore sizes, from high to low temperature, from low to high pressure, from gas supply to exhaust piping, from plant facility to various types of machinery piping are available (300A to 1/8, manually operated to air operated valves, block valves).

METAL DIAPHRAGM VALVE

Direct seal metal diaphragm design is optimum for applications requiring ultra pure fluid such as for semiconductor production process as well as for toxic gas, combustible gas and self sustained combustion gas.
Our unique cleaning treatment is performed on the gas contacting surface, and high corrosion resistant material is used for the metal diaphragm.
Clean products requiring to be free of dead space, free of particles and free of leakage to the outside are available (from 3/4 to 1/8, manual valve, air operated valve, block valve and for high temperature)