Crankcase Pressure Sensing Valve Model 4126 Overview AMOT Model 4126 detects the minor pressure surge that usually precedes a major crankcase explosion. It will detect the smallest pressure buildup caused by worn packing or by excessive blow-by caused by a piston and liner just beginning to scuff. This high sensitivity provides instant warning or shutdown before major damage occurs as the unit will not reset itself automatically. Typical applications l This model is a 2-Way valve for use primarily with AMOT Safety Control Systems Key features and benefits l Suitable for air, gas, or oil systems Type 4126 Crankcase Pressure Sensing Valve l Adjustable range of 0.017 – 0.034 bar (0.25 - 0.50 psi) l Higher range is available with use of auxiliary spring

Crankcase Pressure Sensing Valve - Model 4126 Specification Body material Cast aluminum Internal parts Plated steel and stainless steel Valve seals Diaphragm material Maximum sensed pressure (proof) Maximum valve pressure (port A) Shipped weight (appx.) Standard range With auxiliary spring Pressure ranges Auxiliary spring is furnished loose with each unit Installation factors The Pressure Sensing Port has a 2.54cm (1in.) female pipe tap. It is suggested that the unit be supported by means of a 2.54cm (1in.) pipe nipple from the engine crankcase door or frame. Install with the drain hole down...

Crankcase Pressure Sensing Valve - Model 4126 Service kits 31 6 5 Body assembly Diaphragm cover Main spring Diaphragm cover Diaphragm plate Adjustment spring guild Return spring Machine screw Drive screw Thread seal Machine screw Machine screw Washer (special) Retaining ring Spring housing Pressure range Light - installed, Heavy - shipped loose

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