sEa water butterfly material comparision

[engrasad364]

I need the required the following spec for butterfly valve but my vendor is providing the other alternative, can any one help me to decide should i consider vendor alternative.


Required : BODY MATERIAL = CI, Alternate: Body: ductile Cast iron (Epoxy coated).

Required : TRIM DISC = NI; Alternate: Disc: Aluminum bronze

Required : STEM AND DISC PINS = MONEL; Alternate: Stem and disc pin : 17-4PH material

Required : SEAT = BUNA-N, Alternate: Seats: EPDM seats

 

[BigInch]

No. What you need to know is if the alternate is suitable for your service, but you have not provided any details of your service, so nobody can answer you.

 

[engrasad364]

BigInch, thank you very much for your responce. well we need to use this butterfly valve for Sear water service.
I thought that the Disc of "Aluminium Bronze" material is not suitable for sea water service.