Model E - Thermostatic Valves

Features

● FLOW RATES OF 40 - 75 USGPM

● TAMPER-PROOF TEMPERATURE SETTINGS OF 85ö F TO 235° F

● COMPLETELY SELF-CONTAINED

● COMBINATIONS AVAILABLE: CAST IRON, STEEL, & STAINLESS STEEL 1-1/4" & 1-1/2" PIPE SIZES THREADED & FLANGED CONNECTIONS

● HIGH PRESSURE VERSIONS UP TO CLASS 600# FLANGES
SETTINGS OF 65°F TO 235°F

Applications

● ENGINE & COMPRESSOR COOLING SYSTEMS

● LUBE OIL SYSTEMS

● COGENERATION HEAT RECOVERY LOOPS

● PROCESS CONTROL

● TEMPERATURE MIXING OR DIVERTING

Operation

AMOT Model E Thermostatic Valves are fully automatic, 3- way fluid temperature controllers for diverting or mixing applications. They are used to provide reliable control of fluid temperatures in engine jacket water and lubricating oil cooling systems. These valves are suitable for process control and industrial applications where fluids must be mixed or diverted depending on their temperatures. They may also be applied to cogeneration systems to control temperatures in the heat recovery loop assuring proper engine cooling and maximizing heat recovery.

Tamper-Proof - As with other AMOT thermostatic valves, they utilize fully enclosed, factory temperature element assemblies which provide tamper-proof operation. To change a valve setting, it is necessary to exchange the temperature ele-ment assembly.

Versatile - Model E Valves can also be supplied with special Nickel plated element assemblies and Neoprene seals to resist the corrosive effects of ammonia-contaminated oil in refrigera-tion compressor service.

Viton seals can be supplied for use in fluids which attack Buna N such as phosphate ester and diester oils. With such oils, nickel plated element assemblies should be requested for protection of the bronze parts.

High Resistance to Shock - AMOT thermostatic valves display excellent reliability even under extreme shocks or vibration and can be qualified to MIL-S-901 and MIL-V-19772. Other AMOT Thermostatic Valves are available for water flow rates of 9-2800 USGPM, see Form No. 913.

The valve is supplied with the temperature element assem-bly factory-set to the nominal temperature setting. Tem-perature is sensed at Port A which remains open to Port B (bypass) until the fluid temperature reaches a point 8-10 F below the nominal setting. As the temperature continues to rise, the sliding valve moves to close off Port B and open Port C (connected to the cooler or heat exchanger.) Port B is fully closed 8-10 F above the nominal setting. The valve continually modulates the fluid flow to maintain the nominal temperature. For optimum control, the system should be sized so about 1/2 the total fluid flow is passing through the cooler at full load.

For long life, AMOT Model E valves should not be exposed to continuous temperatures exceeding 65 F above their nominal temperature setting.For occasional short periods such as 1/2 hour, they can be exposed to temperatures of 90 F above their nominal temperature setting, but 250 F maximum. Piping Diagrams Selection AMOT thermostatic valves are selected by the anticipated flow rate through the valve. Refer to Fig. 1. Pressure drop across the valve is usually limited to approximately 2 to 7 psi to maintain good temperature regulation. Versions available from USA factory. Contact factory for Stainless Steel Versions.

Specifications

Internal Trim Materials..........................................Bronze
Standard Seal Material..........................................Buna N
Max. Allowable Pressure Across Valve..20 psi (138 kPa)

Valve Pressure Rating

ELC.............355 psi (2448 kPa)
EFCF........................155 psi (1069 kPa)
EFSJ, EMSJ.............230 psi (1586 kPa)
EFSH, EMSH...........655 psi (4516 kPa)
EFSK, EMSK.........1,000 psi (6895 kPa)

Net Weight

1-1/2ELC...............................8 lbs (4 kg)
1-1/4EF...............................20 lbs (9 kg)
1-1/2EF...............................20 lbs (9 kg)
1-1/2EFSH........................30 lbs (14 kg)
1-1/2EFSK.........................36 lbs (16 kg)