Tender For supply of 40 nb 2 by 2 way pneumatic cylinder operated angle seat valve normally open , 40 nb 2 by 2 way pneumatic cylinder operated angle seat valve normally close , dn 25 2 by 2 way pneumatic cylinder operated angle seat valve normally open , dn 25 2 by 2 way pneumatic cylinder operated angle seat valve normally close , dn 200 butterfly valve with double acting pneumatic rotary actuator operated on off type , dn 200 butterfly valve without actuator , dn 150 butterfly valve with double acting pneumatic rotary actuator operated on off type , dn 150 butterfly valve without actuator