Our pressure regulators (pressure reducers, compressed air reducers) and filter regulators, as well as precision pressure regulators from the standard series made of die-cast zinc, are robust, solid and extremely wear-resistant and therefore qualify for use even under the toughest operating conditions. Not susceptible to shocks, they are great not just in size. The devices in this series can handle even large flow volumes and temperature fluctuations with ease. All pressure regulators and compressed air filters in the KNOCKS standard series are available in the sizes 0, 1, 2, 3, 5, 7 and 8.