Heat Shieldings | Item no.: HSGRH280.06 | EAN: 8721691801012

Gland packing - Graphitized PTFE | gPTFE Tefapak GRH 280

MaterialgPTFE with graphite dispersion
Max. heat260 °C
ColourBlack

€226,12 incl. VAT

Available

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Description

Tefapak GRH 280 Gland Packing

Packing made of thin strands PTFE foil incorporated with graphite. The GRH packing has 40% higher graphite content and at the same time higher strength compared to common PTFE graphited seals. The high performance of GRH packing is the result of a composite structure, that is clearly seen on the image from the SEM electron microscope. The structure of this packing consists of thin layers of colloidal graphite, at the level of 20 µm, enclosed in a PTFE matrix.

Technical properties

Material: PTFE foil with graphite
Temperature range: -200°C to 260°C
Pressure resistance:
Pumps: max. 20 bar
Valves: max. 400 bar
Rotary applications: max. 200 bar
pH range: 0 – 14 pH
Speed:
Pumps: 25 m/s
Valves: 3 m/s
Rotary applications: 2 m/s
Maximum load (pV): max. pV ~ 300 bar·m/s
Average density: ~1.5 g/cc
Min. shaft/bush hardness: ~30 HRC
Available in square profiles from S6 to S25 mm (with a tolerance of ±10%)

DOCUMENTEN & DOWNLOADS

Technical datasheet: Datasheet document
Installation instructions: Installation instructions document

Specifications

Material	gPTFE with graphite dispersion
Length \| m	Varies per diameter
Width \| mm	4 to 30 mm
Height \| mm	4 to 30 mm
Max. direct heat \| °C	260
Colour	Black
Self-adhesive	No

Frequently asked questions

What exactly is gland packing?

A braided sealing cord with a square profile that is laid around the shaft in the stuffing box of a pump or valve. Tightening the gland follower compresses the cord slightly so it seals the shaft without blocking rotation.

Which gland packing materials are there?

Among others pure and graphited PTFE, expanded graphite, aramid, carbon fibre, phenolic fibre and ramie fibre, also in combinations such as aramid-reinforced corners.

Up to what temperature is gland packing resistant?

Depending on the material 120 to 600 °C; the temperature resistance and dimensions are listed per packing on the product page.