*NEW PRODUCTS* MODEL C-MR-1 & C-MR-1-AH REGULATOR

 C-MR-1:  TWO-STAGE REGULATOR, VAPOR WITHDRAWL, W/ PRIMER BUTTON

C-MR-1-AH:  TWO-STAGE REGULATOR, AIR HEATED, W/ PRIMER BUTTON

Description

The C-MR-1 & C-MR-1-AH regulator is a compact two stage double diaphragm type regulator designed specifically for use with small air cooled engines. It combines both primary and final

secondary stage regulator into a single compact unit. The regulator is simple to mount on any engine size up to around 28 HP by means of a multi-purpose type bracket. The C-MR-1 regulator uses vapor fuel and the C-MR-1-AH can used liquid with the fins mounted next to a heated exhaust area. The fuel inlet received fuel from the fuel tank and the fuel out flows to the carburetor or adaptor.

Operation

Vaporized fuel is admitted to the regulator inlet at tank pressure (up to 250 psi). Since the secondary valve is closed, the pressure on the internal side of the primary diaphragm builds up

until it overcomes the spring acting on the other side of the diaphragm. The primary valve is held open by the primary diaphragm spring until the pressure in the primary chamber reaches 2 to 3 psi, at which point the force on the diaphragm balances the spring force and closes the valve. The secondary diaphragm, actuated by vacuum obtained from the carburetor or

adaptor acts against the secondary valve spring. As this vacuum begins acting on the diaphragm, the diaphragm is moved nearer the center of the regulator, opening the secondary valve. As more fuel is required, vacuum from the carburetor or adaptor increases, causing the secondary valve to open further, admitting more fuel. When fuel is flowing, the pressure on the primary diaphragm is lowered slightly, permitting the spring to open the primary valve to

attempt to bring the pressure back to 3 psi.