Instrument valves for permanent installation. They mount in part A-316, A-317, type C Manometer connections or Magnehelic® Gage and connect to metal tubing or 1/8" pipe.

Gage Connectors for Manometers. Molded nylon construction, threaded .786 x 27 N.S., with O-ring seal.

POPULAR MODELS

Model Number	Description
A-310A	3-way vent valve, plastic, 1/8" NPT to 1/4" metal tubing, 80 psi rating, replaces former Model A-310 (brass).
A-310B	3-way vent valve, plastic, 1/8" NPT to 1/4" metal tubing, 10 psi rating.
A-311	Shut off valve, brass, 1/8" NPT to 1/8" NPT.
A-312	Shut off valve, brass, 1/8" NPT to 1/4" metal tubing.
A-355	Porting valve, acrylic plastic, 1/8" NPT inserts, used for convenient indication of pressure at two points with a single gage.
A-365	Dual porting valve, acrylic plastic, 1/8" NPT fittings, for monitoring three pressures, two at a time, with one gage.