400 Series

Penflex’s only helical hose option, 400 series is available in sizes 1/4” – 1” ID. Annular hose is more commonly used than helical, with some estimates suggesting it comprises 95 percent of the corrugated metal hose market.

Some users opt for helical instead of annular hose because it is easier to drain the hose of liquid media. Furthermore, when comparing certain product lines, a fully compressed helical hose can achieve higher working pressures than a standard pitch annular hose.

However, helical hose can torque under pressure given their screw-like design, and annular hose has been shown to have far better flexing characteristics. Where torsion is likely to occur, or in high cycle applications, annular hoses – specifically P3 – may be a better design choice.

• Construction: Annular hose with a standard pitch
• Hose material: 316L and 321 stainless steel
• Braid material: 304L and 316L
• Other alloys available upon request
• Hose sizes: 1/4″ through 2″