Nitra pneumatic 22-mm pushbutton and switch pilot devices are intended for use with pneumatic valve bodies. These pneumatic pushbuttons also can combine valve bodies and electrical contact blocks. ECP series 22-mm pneumatic pushbuttons and switches are used with EVP series valve bodies to create manual valve assemblies or hybrid electro-pneumatic actuators. These operators allow mounting up to two three-way valves or one valve and one to three ECX series electrical contact blocks. The operators fit in a standard 22-mm electrical pushbutton hole. The EVP series manual valves that are used with Nitra pneumatic pushbuttons and switches also function as pneumatic limit switches.