Technical manual for Swagelok LD Series diaphragm valves with specifications, cleaning standards and ordering information.
The Swagelok LD Series diaphragm valves are designed for high‑pressure gas distribution, switching and isolation services, with working pressures up to 300 psig (20.6 bar). The series includes cast, forged and bar‑stock stainless‑steel body constructions and offers a range of sizes from 1/4 in. to 1 in.
The document provides detailed material specifications, surface‑finish data, cleaning and packaging procedures (SC‑11, SC‑01), performance curves, and comprehensive ordering information for each valve type and configuration.
| Maximum Working Pressure | 300 psig (20.6 bar) |
|---|---|
| Body Materials | Cast, forged and bar‑stock stainless steel |
| Surface Roughness (Cast Body) | Ra ≈ 20 µin (0.51 µm) |
| Surface Roughness (Forged Body) | Ra ≈ 5 µin (0.13 µm) |
The LD series diaphragm valves are rated for up to 300 psig (20.6 bar) working pressure.
Standard cleaning uses the SC‑11 process (MS‑06‑63) and ultra‑pure cleaning uses the SC‑01 process (MS‑06‑61).
Cast body valves can be supplied with a standard finish of Ra ≈ 20 µin (0.51 µm) or an optional electropolished finish of Ra ≈ 10 µin (0.25 µm).
The valve bodies are available in cast, forged, or bar‑stock stainless‑steel constructions.