1672 - Pressure Sensing Valves

Features

● EASY FIELD ADJUSTMENT

● COMPATIBLE IN HYDRAULIC OR GAS SYSTEMS

● FACTORY SET

● GULFPROOFED FINISH & VITON SEALS

● PNEUMATIC LOCKOUT AVAILABLE

Applications

PRESSURE SENSING APPLICATIONS ON ENGINES AND OTHER INDUSTRIAL EQUIPMENT

● COMPRESSOR SUCTION OR DISCHARGE

● LUBRICATING OIL

● COOLING WATER COMBUSTION AIR

● CONTROL AIR

● FUEL OIL

● FUEL GAS

● STARTING AIR

Operation

The operation of the 1672 Pressure Valve is simple and straightforward. The sensed pressure moves the diaphragm or piston operator against the larger adjusting spring. The motion is transmitted to the valve through a lever and fulcrum pin which operates the valve push rod. Location of the pin in one of two holes in the case determines the rising or falling pressure trip function. See Parts List cutaway on the back page and Figure 1 above.

Pneumatic Lockout is an optional feature which can eliminate the need for a separate blocking valve. For a tripping pressure of 16 psi falling, a 100 psi lockout pressure is required. 200 psi is required to override a 30 psi trip setting. The maximum lockout pressure is 250 psi. This feature is available only on models in Pressure Range 1. See Figure 2 above.

AMOT Model 1672 Pressure Valves are 2-way normally open sensors (closed under satisfied operating conditions) which are opened by the sensed pressure decreasing or increasing past the trip point. Dual purpose construction (trip on rising or falling pressure) provides a wide latitude of applications and permits easy field adjustment or change-over from trip on falling to trip on rising pressure. The valve is snap-acting and suitable for hydraulic or gas control systems with up to 80 psi maximum control pressure.

Pressure Ranges 1, 2, & 3 (Diaphragm Sensor):

● Adjustable ranges from 5 - 315 psi.

● Easy to service/replace diaphragm.

● Pneumatic lockout available for Range 1 (See description under Operation).

Pressure Ranges 4, 5, 6, & 7 (Piston Sensor):

● Adjustable ranges from 15 - 3600 psi.

● Corrosion resistant, stainless steel piston sensor.

● Easy to service/replace Teflon piston seal.

With its sturdy but simple construction, the 1672 Pressure Valve provides reliable and economical pilot control for operating pneumatic indicating relays such as AMOT Model 2400 and 4400, or for directly controlling master shutdown devices such as AMOT 1476, 2800, or 4112 Safety Controls or AMOT 4057 3-Way Valves.