Main propellant valves, pre-valves, check valves, relief valves and pyrotechnic isolation valves.
What decides the purchase: Flow coefficient Cv · response time · MEOP · leak rate · actuation type
Typical materials: Stainless 316L, Inconel, PTFE and Vespel seats
Typical processes: Machining, EB welding
What changes when it has to fly: Cleanliness for oxygen service and leak rate in vacuum are the deciding parameters — an industrial valve of the same pressure rating is not equivalent.
Engineering reference written by us, not a supplier claim.
1 Indian supplier in this index make propellant valves, plus 2 international. They are Panam Engineers Ltd. 1 hold published certifications.
| Supplier | Location | Certifications | Evidence |
|---|---|---|---|
| Marotta Controls intl | international | — | stated capability |
| Panam Engineers Ltd | Mumbai | 1 published | stated capability |
| VACCO Industries intl | international | — | stated capability |
Certifications are as published by each company and unverified. "Product indexed" means we hold an actual product record; "stated capability" means the company says it does this.