What is PTFE gland packing used for?

PTFE Packing: Designed for use in dynamic and static seals in hygienic condition also for work in chemical, pharmaceutical and food industry.

Why is gland packing used in valves?

Gland packing is used extensively for the sealing and restriction of leakage of the working fluid along the stem in valves and along the shaft in the case of pumps and also for stationary duties like manhole cover sealing.

What is gland packing in valves?

The gland packing is a contact-type sealing element. Compared with other types of shaft seals, they are adjustable and suitable for use with pressures and circumferential speeds higher than those radial shaft seal rings are used for (see also Shaft seal).

What is gland packing made of?

Gland packing Grafopak GRP 420 Packing made of expanded graphite yarn with addition of carbon fiber, impregnated with PTFE dispersion. This packing has an excellent heat conductivity, a low friction factor, excellent self-lubricating properties.

What is graphite gland packing?

VG4 is inter-braided from pure Graphite yarn impregnated fibre by fibre with pure Graphite powder. Suitable for pumps and valves in extreme conditions or where the value of the best quality Gland Packing can be realised. Combines expanded graphite and PAN graphite fibres for performance and service life.

What is packing seal?

Packing seals have been the most widely used sealing solution for many years. Packing seals use rope-like materials that wrap around the shaft of a pump, filling in dead space and minimizing fluid loss. Fluid leakage is stopped by either a wedge, V-ring or O-ring as the lapped faces collapse.

How many types of gland packing are there?

For many water pumps gland packing is used to prevent any leakage from the shaft of the pump. However, the question becomes: “Which type of packing should you use for any given type of pump?” Well, there are eight main types of gland packing that we carry and each should be used in different situations.

How does valve packing work?

Valve packing is a string sealant that is used to prevent liquid leaks in valve stems and stuffing boxes. These strings are impregnated with PTFE ® or graphite to make them pliable, self-lubricating, and durable. Aside from leakage prevention, valve packing protects valve stems and stuffing boxes from wear.

Is gate valve and globe valve the same?

A gate valve can be used for starting and stopping flow but they cannot regulate the level of flow. One of the big differences between a gate valve and a globe valve: a gate valve can be installed in various directions while a globe valve only goes in one direction.

How do you remove gland packing?

The gland packing should be cut with a sharp knife to avoid fraying of the edges. Do not use scissors or hack saw blade etc. A heavy duty engineer’s knife or a sharpened ordinary knife would do.