rature of the working environment, we should selec the product with the corresponding material. The protective solenoid valve and explosion-proof solenoid valve produced by our company can meet the two installation methods of NAMUR board connection and pipe connection. It has two types which is two-position five-way or three-position five-way. It can directly control single-acting and double-acting pneumatic actuators without any adapter plate assistance and is equipped with a safe and reliable