To change the set pressure, weights must be added or removed from the pallet, a new pallet must be used, or the spring must be adjusted (if a spring-loaded vent valve is being used).

• 为改变设定压力，可在垫板上增加或减少重量，必须使用新垫板，或调整弹簧（如果使用弹簧式通气阀）。