Series 40

Moore Products Series Pressure Regulators

Models, 40, 41, and 42 Precision Pressure Regulators control air pressures in applications requiring precise and dependable regulation, such as pneumatic instrument circuits, test stands, production checking fixtures, and industrial air gages. As such, they are suitable for dead-end Service and flow up to a maximum of 110 scfm.

A unique, two-stage piloted design provides outstanding accuracy. Rugged Construction—with no links, levers, pivots, or other friction-producing members — ensures reliable, maintenance-free operation. These features allow a regulator to maintain constant output pressure, regardless of even the widest changes in flow or supply pressures. In fact, a regulator using a Model 40, 41, or 42 is practically a self-contained pressure controller operating its supply-plunger valve via a built-in, high-gain pneumatic amplifier.

A fine-turn, precision screw is used to manually load the range spring, which sets the regulated pressure. When the adjusting knob is turned clockwise, the increased spring force is exerted on the top diaphragm assembly, decreasing the nozzle clearance and increasing the pilot pressure. Because the source for pilot pressure is supply air flowing to the pilot pressure chamber through the restriction screw, the Increased pilot pressure forces the exhaust diaphragm assembly downward. This action closes the exhaust port, and contacts and moves the valve plunger, which opens the supply port. This increases the regulated output, which also feeds back to the top diaphragm assembly. The regulator locks-up or throttles at the new output value when the feedback force of the top diaphragm assembly equals the range spring force.

A safety release valve is incorporated in the top diaphragm assembly of several models. II operates if the regulated pressure increases 3 psig more than the set pressure and exhausts air through the atmospheric vent in the top housing. Over pressure causes the diaphragm to Move upward, which opens the safely release valve.