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The Duplomatic QTM2 valve is a flow restrictor valve with built in check valve for reverse free flow, made as a modular version with mounting surface according to the ISO 4401 (CETOP RP 12H) standards.
Can be assembled with all ISO 4401-02 (CETOP R02) modular valves without use of pipes, using suitable tie-rods or bolts.
Supplied with countersunk hex adjustment screw and locking nut. Rotate anticlockwise to increase the flow rate.