Stainless Steel Check Valves Buyer's FAQ
Q.Will I get a tracking number when my item ships?
A.For customers who chose UPS: a tracking number is automatically sent via e-mail before the order leaves our warehouse. For customers who chose FedEx: a tracking number is usually available if requested by either e-mail or phone. For customers who chose USPS: tracking numbers are only created by USPS for select services, such as insured packages. We will be happy to provide available tracking information if requested.
Q.Are the CVSS series check valves a Food Grade suitable product?
A.No
Q.Viton seal or PTFE seal, which is right for you? Please read below!
A.Elastomer Durability
- PTFE seat will be most ozone resistant and longest lasting seal available.
- Viton seat will be ozone resistant up to ~5% ozone, also ozone by-products can deteriorate Viton seat.
Sealing Capabilities
- Viton is very pliable and will offer the most reliable seal.
- PTFE is very rigid, small particulates will keep this material from offering a positive seal.
