1) The valve stem bearing use "copper sleeve", which with good wear and corrosion resistance. Although cost is 50% higher than other materials, prolong the service life by 60-70%;
2) Rubber seat contains over 50% rubber, with stable resilience and tension. Although the cost is 30% higher than that of similar products in the market, its service life can be extended by 1-2 years; valve seat option with PTFE, NBR, EPDM, FKM etc.
3) Pneumatic actuators includes 2 type: double acting and Spring return; Double Action pneumatic actuators with double cylinder structure, including GT and AW Models; Spring Return pneumatic actuators with single cylinder structure, including GT, AT and AW Models.
4) Cost of Double action pneumatic actuator is lower than Spring return actuator;