TO - Tube Only (No braid)

TO grade hoses (available in GP & AS) is a lightweight hose, used in applications where working pressures are low and where there is no need for the physical protection offered by an external braid.  TO grade tube is not normally helium tested and is not vacuum proof

SS - Stainless Steel Braid

Stainless Steel braid hose is the general purpose product and can be used in applications involving high temperatures and working pressures. High tensile grade 304 stainless steel wire is used, to give maximum pressure resistance and external protection to the hose.

PB - Polypropylene Braid

Polypropylene braided hose is often preferred to SS in applications involving frequent handling and movement of the hose, and where temperatures are within the range -30°C and +90°C. Polypropylene braid is lighter in weight, and any broken strands will not cut the operator's hands.
In addition, Polypropylene braid is not prone to "chloride stress corrosion" and has generally good chemical resistance.

NOTE: Prolonged exposure to sunlight eventually results in UV degradation of PB braid.

HB - Hastelloy Braid (C276 Grade)

Purpose - Hastelloy Braid is used instead of SS where severe chemical corrosion conditions exist around the outside of the hose.  One way in which this can happen is when Chlorine or Fluorine are being transferred.  Diffusion of trace quantities of such gases through the PTFE liner can lead to atmospherically wetted fluorine or chlorine attacking the braid material, in which case the Hastelloy Braid would be resistant.

Specifications - Same as for SS except the Burst Pressure and MWP are 50% lower. Also the size range is restricted from 1/2" up to 2" bore only.

KYB - KYNAR (PVDF) Braid  (Polyvinylidene Fluoride Monofilament)

Purpose  -  Kynar Braid is used for the same reasons as Hastelloy Braid above, but only in applications where the reduced pressure and temperature ratings of KYB are acceptable.