Stoppers 290, beaded, R 3/8 ET black malleable iron fitting - Riegler 133788

Stoppers 290, beaded, R 3/8 ET black malleable iron fitting, operating temp. -20 °C to 300 °C, ISO 7-1 According to DIN EN 10242 (previously 2950). Malleable iron cast fittings in black steel, non-galvanized, is the classic fitting series in connection series in piping construction. Our malleable iron cast fittings are characterized by high mechanical strength and standardized fitting technology. Working minimal temperature = -20 °C, 25 bar. Working pressure for temperature range from -20 °C to 120 °C: 25 bar. Working pressure for temperature range from 120 °C to 300 °C: 20-25 bar.

Technical data

Standards and origin

• Standard thread: ISO 7-1
• Customs tariff number: 73071910
• Country of origin: CN

About Plugs and Caps

Plugs and caps close off unused ports in pipework built from malleable cast iron fittings, either permanently or as a reserve for a later extension. The group covers male threads from R 1/4 to R 3 plus female Rp 1/4 and Rp 3/8. All 39 items belong to the fitting series to DIN EN 10242.

What matters when choosing

• Thread: plugs come with male R threads and screw into a female port, caps have female Rp threads and go over a male end. The point you need to close determines which of the two you order.
• Nominal size: the range runs from R 1/4 to R 3 and has to match the fitting or valve carrying the port.
• Thread standard: ISO 7-1 throughout, which keeps the parts compatible with the rest of the malleable iron programme to the same standard.
• Material: black malleable cast iron B350-10 design symbol A with a hot-dip galvanised surface, suited to mechanically loaded lines.
• Temperature range: the items are rated -20 °C to 300 °C, which also covers steam and hot water lines.

Typical applications

• Closing reserve ports on distributors and header lines
• Sealing test and drain connections after a pressure test
• Blanking off a line after a consumer has been removed
• Pipework in compressed air networks and industrial supply lines
• Keeping common sizes in stock for maintenance modifications

The material is black malleable cast iron B350-10 design symbol A, hot-dip galvanised, to DIN EN 10242 with a surface quality to DIN 2444. The stated operating temperature range is -20 °C to 300 °C.