standard design :
standards:din,3a,sms,iso/idf,bs/rjt,asme/bpe etc
the parts of valves :an actuator ,diaphragm and body which assemble together with bolts and nuts.the entire valve assembly in meticulously.the actuator can be manual and pneumatic,the diaphragm made of artificial rubber which can have ald degree.the body can be two way or three way.
connection:clamp,weld,t-type tee,utype tee etc
