Provided with a non-return valve to control opening and closingspeed. It can be adjusted to optimal opening and closing speed tocater for working conditions when pump starts or stops running.

Applicable for high-rises to reduce the production of water hammerand slamming, thus to effect quiet close.

Pressure Grade: PN10, PN16, PN25

Diaphram Type: DN50-DN350

Piston Type: DN400-DN800