Product Description: VRD-M Series H₂0₂Plasma Sterilizers Pump • Stainless spring is used for a better corrosion resistance. • Two-Shift adjustable gas ballast valve satisfies different requirements of condensable vapor (such as water vapor) to be exhausted out of pump in different processes. • Dual protection of oil anti-suckback ensures vacuum system from oil pollution when pump stops running and needs to be easily restarted. • Forced oil circulation system consisted of oil pump and constant pressure oil supply mechanism ensures stable running of the pump. • Less components are used, easy to maintain and repair.