Dwyer Instruments A-331 Dwyer 1/8" NPT Filter Vent Plug, Nylon and Sintered Metal

Filter Vent Plug

The A-331 Filter Vent Plug is a simple, reliable solution for venting and testing vacuum and pressure filters. Conforms to ISO 5167. Includes striker for manual venting. Made of nylon material with sintered metal at the tip.

This filter vent plug is used on all Series A-331 regulators. The nylon body and sintered metal filter provides protection against dust and dirt that may enter the regulator through the pressure adjustment screw during operation.

A filter vent plug is used to vent all gauges and for the removal of air from the casing. The Sintered metal screen prevents water, insects, and other contaminants from entering the case. Its 1/8" NPT male threads on one end, and a 3/4" barb fitting on the other, allow for easy connection to most size tubing.

The A-331 Filter Vent Plug is designed for use with Dwyer Instruments Solenoid Operated Self-Adjusting Diaphragm Valves, Style Numbers 302XFL, 303XFL, 311XFL and 510VFL; to prevent excessive pressure buildup during long periods of valve non-use.

The A331 is a Gate Valve Filter Vent Plug that has been designed to fit standard 1/8" NPT gate valves. This product is constructed of Nylon and Sintered Metal.

This Dwyer Instruments filter vent plug allows air to pass into but not out of a system. It is used with syringe filters and a flow restrictor to create a vacuum in the system. It has a nylon body with a sintered metal center wedge. It is 1/8 inch in diameter and comes with a threaded brass collar.

Designed to replace the standard vent on wet-filter venturi pressure gauges that utilize the Dwyer #1330 vent adapter. The Dwyer #A-331 filter vent plug precludes contaminants from entering the gauge. This plug will fit many filter and venturi/totalizers that use the Dwyer #1330 seal adapter.