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. Operation Charging and Startup For optimum performance, surge suppressors should be charged to a pressure 2 to 10 psi (0.01 to 0.07 MPa, 0.1 to 0.7 bar) lower than system pressure. Automatic Models CAUTION Automatic surge suppressors must have the air supply connected before you start pumping. Failure to do so could result in the internal air valve puncturing or rupturing the bladder. The air pressure gauge (1) (See Parts Drawings on pages 14 and 15) on automatic surge suppressors remains at zero pressure even after the air line is connected, because the surge suppressor only allows air into the air chamber when it is required to dampen pulsation. After the air supply line is attached to the one-way check valve (8) and air is available, you can start the pump. No further adjustments are necessary. NOTE: Automatic surge suppressors are not recommended for use as suction stabilizers at the pump inlet or as a surge suppressor at a quick-closing valve. Adjustable surge suppressors should be used for such applications. Manual Models CAUTION Manual surge suppressors must be charged before you start pumping. Failure to do so could result in the internal air valve puncturing or rupturing the bladder. Before you start the pump, charge the surge suppressor with air line pressure. 1. Start the pump to generate system pressure. 2. As pressure increases to approach working pressure, gradually decrease the regulated air supply pressure into the surge suppressor by adjusting the regulator (4) (See Parts Drawings on pages 14 and 15). 3. Wait for up to one minute to allow the system to respond to the adjustment before you make any further adjustments. Generally, pulsation is most effectively minimized when the air supply to the surge suppressor is regulated to 2 to 10 psi (0.01 to 0.07 MPa, 0.1 to 0.7 bar) lower than system pressure. . . Troubleshooting WARNING To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 7. Relieve the pressure before checking or servicing the equipment. Check all possible problems and causes before disassembling the pump. PROBLEM CAUSE SOLUTION Surge suppressor does not hold pressure. Manual or automatic models: –Leaking threaded connections –Loose flange bolts or clamp –Failed bladder or bellows –Blocked air line to unit –Check all threads for leaks. –See Torque Table, page 11. –See Bladder Failure, page 10. –Use 1/4-in air line. Automatic models only: –One-way valve at air inlet is installed backwards. –Gauge shows no pressure, and pump is not running. –Arrow should point toward surge suppressor. –Pressure does not register on gauge until pump is started. Manual models only: –Faulty regulator –Check regulator. Dampening effect of surge suppressor is not sufficient. Surge suppressor installed incorrect distance from pump Surge suppressor should be installed within 10 pipe diameters of pump discharge. Improper pressure charge See Charging and Startup,...

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