Heat Shieldings | Item no.: HSXR640.06 | EAN: 8785324101580

Gland packing - Flexible graphite and carbon fiber corners | Karbopak XR 640

MaterialExpanded graphite and carbon fiber C98 with PTFE
Max. heat600 °C
ColourBlack

€193,39 incl. VAT

Available

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Description

Karbopak XR 640 Gland Packing

The XR 640 packing is made of expanded graphite and high modulus carbon fiber C98 with the addition of corrosion inhibitors and light PTFE impregnation, which guarantees tightness at lower gland pressure. Its braid is made in the form of reinforced corners, which significantly affects the mechanical strength of the seal, while maintaining excellent sliding properties of graphite.

Technical properties

Material: Expanded graphite and carbon fiber C98 with PTFE
Temperature range: -200°C to 600°C
Pressure resistance:
Pumps: max. 30 bar
Valves: max. 200 bar
Rotary applications: max. 300 bar
pH range: 1 – 14 pH
Speed:
Pumps: 30 m/s
Valves: 3 m/s
Rotary applications: 2 m/s
Maximum load (pV): max. pV ~ 500 bar·m/s
Average density: ~1.15 g/cc
Min. shaft/bush hardness: ~40 HRC
Available in square profiles from S6 to S30 mm (with a tolerance of -5/+10%)

DOCUMENTEN & DOWNLOADS

Technical datasheet: Datasheet document
Installation instructions: Installation instructions document

Specifications

Material	Expanded graphite and C98 carbon fibre with PTFE
Length \| m	Varies per diameter
Width \| mm	4 to 30 mm
Height \| mm	4 to 30 mm
Max. direct heat \| °C	600
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.