AIGI Environmental Inc.
AIGI 26W General-Service PTFE Valve Packing
AIGI 26W is a braid of 100% pure, non-hardening PTFE fibre with an additional coating of pure PTFE dispersion for improved sealability. It is a universal valve packing for chemical and low-pressure steam service, and a proven long-term sealing solution for manually operated valves. Its low friction also makes it particularly well suited to air-operated control valves.
Product Benefits
- Chemically inert PTFE: Pure PTFE is about as chemically inert as packing materials get, so AIGI 26W seals reliably across the full range from strong acids to strong alkalis.
- Dependable long-term seal: Because the fibre is non-hardening, the packing does not glaze or crack with age. It remains a dependable seal on valves that may sit untouched for years between operations.
- Dispersion-coated sealability: The extra PTFE dispersion coating fills the voids in the braid for better sealability, while keeping friction very low.
- Smoother valve control: On air-operated control valves, low stem friction matters directly: the actuator positions the stem more accurately and responds more smoothly.
Where It's Used
- Manual and control valves: Typical duties are manually operated valves and air-operated control valves handling steam, water and chemicals.
- Chemical and steam service: It serves as a universal valve packing in chemical plants and in low-pressure steam systems.
- Standard maintenance stock: Its versatility makes it a common standard stock item for valve maintenance.
Good to Know
- White and graphite-free: The packing is white and free of graphite, which suits services where colour contamination or material purity is a concern.
- Reciprocating capability: It is rated for reciprocating duty at higher pressure than rotary duty, so it extends beyond valves into reciprocating equipment.
- Foundation of a family: AIGI 26W is the foundation of a small family: silicone-rubber-cored versions (AIGI 26WSC with a single core, AIGI 26WMSC with multiple cores) adapt the same pure-PTFE braid to rotating shafts with runout.
- Pump-duty alternative: For pump duty with graphite-assisted heat dissipation, the related AIGI 26 line is the usual pick.
