Rcd Regulator Maintenance - Tecfluid M21 Series Instruction Manual

Place the membrane body (7) so that the 6 holes match those of the regulating membrane
(3), ensuring that the spring (5) locks in its correct position inside the body cavity (7).
Fit and tighten the screws M6 (6) with their respective washers, alternately and crosswise to
ensure an uniform pressure over the entire membrane surface.
Place the balance spring (10) in the spring support housing (11).
Place the regulating valve (1) into the balance spring (10) on the side of the short shaft.
Install or replace by another with the same thickness, the PTFE seal of the spring support
(11).
Screw completely the spring support (11) in the valve body (9), making sure that the long
shaft of the regulation valve (1) passes through the hole and stay in the valve guide (8).
Screw the connection (2) that connects the valve body (9) to the flowmeter M21.
Screw the connection (4) that connects the body of the membrane (7) to the "T" on the fluid
outlet.
17.6

RCD regulator maintenance

Unscrew the connection (4) that connects the valve body (9) to the flowmeter M21.
Unscrew the connection (1) that connects the "T" on the fluid inlet to the membrane body
(10).
Unscrew the 6 screws M6 (3). Remove them with the washers.
Pull apart the bodies (9) and (10). The spring (8), the regulating membrane (11) and the
regulating valve (5) will be visible.
Unscrew the regulating valve (5) from the metallic element (2) housed in the regulating
membrane (11).
Loosen the support (7) with a spanner number 19. Unscrew until removing it. Along with the
support (7) it will leave the seal.
After checking the good condition of the elements, also check that the inside of the body
and especially the seat of the regulating valve (5) do not show deterioration.
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