Types

• Type OS: neutral, blank

• Type OSS: neutral, black anodized

• Type ES: with DIN re-fill symbol, blank

• Type ESS: with DIN re-fill symbol, black anodized

• Type AS: with DIN drain symbol, blank

• Type ASS: with DIN drain symbol, black anodized

Identification no.

• No. 1: without vent drilling

• No. 2: with vent drilling

• Type OS, ES and AS: fine turned, blank

• Type OSS, ESS and ASS: fine turned, black anodized
• Symbols laser engraved

Sealing ring rubber FPM (Viton^®)

Identification by not black finish of seal