790HPNM The 790 series high-pressure dispense valve is an ideal economic choice to dispense high viscosity materials such as silicones, RTV, sealants and greases. The 790HPNM provides a snap-release shut off after dispensing, resulting in a suck-back at the fluid outlet, thus preventing any drip or post extrusion.
Operation
The 790HPNM is a balanced type "on/off" segmented high-pressure spool valve. Applying a minimum of 50 psi to the air inlet will force the spool forward, under pressure from the internal tension spring, dispensing the material.
Releasing the air pressure results in the internal spring snapping back into position and closing the valve.
The normal operation of the 790HPNM is with a 3-way air valve controller DSP501A (see diagram). Should the operation require automation, a slightly faster closing action can be achieved using the 4-way valve controller VC-1195A.
