Masoneilan 78-40 Filter Regulator Pressure Range 5-100psi

The 78 Series pressure regulators are compact, lightweight, high-performance pressure reducing valves. They are used primarily for supplying a stable source of air to process control equipment such as current to pneumatic transducers and control valve positioners

Principle of Operation

Rotation of the pressure setting knob compresses the range spring against the diaphragm plate, opening the main supply valve. As the outlet pressure increases, it flows through the aspirator and acts on the lower side of the diaphragm, causing it to move upward until it balances the force of the range spring. This balanced condition maintains constant output pressure, with changes in supply pressure and output load. If the output pressure rises above the set pressure, the relief valve opens and bleeds the excess pressure to atmosphere. Should dirt or other foreign substance lodge under the inlet valve seat resulting in increased outlet pressure, the additional pressure exerted on the diaphragm will cause the relief valve to open, relieving the excess air through the relief valve seat and spring case vent to atmosphere.

Mengchuan Instrument Co., Ltd. is located in Liushi Town, Yueqing City, Wenzhou, Zhejiang Province, surrounded by the beautiful world natural and cultural heritage - Yandang Mountain! It is mainly engaged in 2000 differential pressure gauge, red oil differential pressure gauge, pressure differential pressure transmitter, liquid level transmitter, diaphragm pressure gauge, shockproof pressure gauge, electric contact pressure gauge, stainless steel pressure gauge, precision pressure gauge, micro pressure capsule gauge, floating ball liquid level gauge, floating ball switch, liquid level controller, intelligent energy gauge, light column gauge and other products. The products are widely used in machinery and civil industries such as plastics, food, printing, chemical industry, petroleum, medical treatment, oven, light textile, printing and dyeing, air conditioning, family and so on.

The company adheres to the business philosophy of "customer first, forge ahead" and adheres to the principle of "customer first" to provide our customers with high-quality services. Welcome!