The Tridak model 775 is a compact, air actuated, normally closed, spool type shutoff valve that provides precise control over both the rate of flow while operating, and the amount of suck-back when closing.

Adjustable flow gives absolute control over the amount of material deposited during a specific period of time. Control over the amount of suck-back is mandatory to achieve consistent string-less cutoff of tacky materials and to eliminate air entrapment. It also prevents a droplet from remaining on a dispense nozzle when used with thin materials. Both of these factors drastically effect accuracy and repeatability.

Both controls are conveniently located on the end opposite the material outlet and are lockable to prevent drift or tampering.

Available Models:
775V - Valve with Snuff Back
775SS - All Stainless Steel Construction
775SSW - Stainless Steel Wetted Areas
775H - Heated with Thermocouple & Temperature Control

The Model 775H is a modified 775 valve that incorporates a heating element and a temperature sensor. It is capable of raising the valve temperature to 400 degrees F. It is intended to be use with a temperature controller which we can provide.

This valve is particularly useful for dispensing high viscosity materials that, when heated can be dispensed at a much lower viscosity. The valve’s features are:

Heated Valve Air actuated, normally closed, spool valve Precise control over the amount of suck back Accurate control of flow rate Cycle Rate can exceeds 400/min

Specifications of the 775H:
Thermocouple: Iron constantan
Heating elements: (2) 50 Watts
Size: 1 1/4” x 1 1/4” x 5 ½” 31.75 x 31.75 x 139.7mm
Weight: 0.6Lbs, 272Grams
Actuating air pressure required: 50 psi minimum
Maximum fluid pressure: 500 psi
Fluid inlet thread: 1/8 NPT
Fluid outlet thread: 1/4 NPT - Others Available
Body material: Anodized Aluminum or Stainless Steel

The 775 valve works in conjunction with the 455.775.826 controller.

© Drawbridge Leaders, Inc. 2006-8