GRACO Vent Valve – 1/8 in. NPT Male, 4000 psi - (SKU: 115121)The GRACO 115121 Vent Valve is a robust component designed for venting pressurized lubricant in single line parallel automatic lubrication systems. It features a 1 8 in. NPT male connection and is constructed with fluid side wetted parts made of carbon steel and Viton (fluoroelastomer), and air side wetted parts of aluminum and Buna N. Its primary function is to enable injector reset for the next lubrication cycle by venting pressurized lubricant,

The GRACO 650021 is a Husky 1050P-E air-operated double diaphragm pump

Periodically check for leaks and tighten connections

Using a genuine GRACO muffler ensures proper fit

Follow recommended cycle rates for continuous use (93–140 CPM) and circulation systems (20 CPM)

Designed for reliability in industrial lubrication systems

stainless steel (SS)

Genuine GRACO replacement part

but it is intended to facilitate secure and efficient connections within GRACO equipment

wear-resistant seal is required

It is constructed from nylon (NYL) and is intended to function as a durable

Follow equipment manual for specific maintenance intervals

Enhances safety during system operation by allowing controlled fluid pressure and safe disconnection for maintenance