How do I determine the packing size?

The cross-section equals half the difference between the stuffing box bore and the shaft diameter: (bore − shaft) / 2. For a 60 mm bore and 40 mm shaft, a 10 × 10 mm square section is used. If unsure, send us your dimensions.

What are the minimum order quantity and lead time?

Standard sections ship from stock in boxes from 1 kg. Custom sections, lengths or impregnations are produced on short lead times. We organise domestic and export shipments.

Our own production

Graphite Packing

High-temperature, high-pressure gland packing braided from low-sulphur expanded pure graphite yarn. For valves and pumps on steam, hot oil and chemical lines; optional Inconel or stainless wire reinforcement.

Key specifications

Material: Low-sulphur expanded pure graphite yarn; optional Inconel / stainless wire or glass fibre reinforcement
Temperature: −200 °C / +450 °C (+650 °C in steam, non-oxidising media)
Pressure: Pumps 30 bar · Valves 250 bar
pH range: 0 – 14

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Phone: +90 212 283 21 29
WhatsApp: +90 542 586 65 43
Email: info@yamanconta.com

Product description

Graphite packing is a braided gland packing produced by interbraiding low-sulphur expanded pure graphite yarn, designed for high temperature and high pressure. Graphite's outstanding thermal conductivity, chemical resistance and low coefficient of friction make this packing the standard solution for valves and pumps on steam, hot oil and aggressive chemical lines. It does not score stems or shafts and seals as soon as it is seated.

Features and benefits

Very wide temperature range: from −200 °C to +450 °C; up to +650 °C in steam and non-oxidising media.
High pressure: up to 250 bar in valves; reinforced types offer even higher mechanical strength.
Full chemical resistance: pH 0–14; almost all media except strong oxidisers (nitric acid, chromic acid).
Excellent heat dissipation: carries frictional heat away quickly; safe at high shaft speeds.
Low friction, easy gland adjustment: long service life, infrequent maintenance.
Corrosion-inhibited option: prevents pitting on stainless valve stems.

Types

Pure graphite packing: expanded graphite yarn reinforced with cotton or glass fibre; general purpose for valves and pumps.
Wire-reinforced graphite packing: Inconel or stainless steel wire reinforcement; the highest pressure and temperature valves, steam turbines.
Corner-reinforced (carbon / aramid corners): high-pressure pumps requiring extrusion resistance.

Where is it used?

Steam and condensate valves, hot oil systems, refinery and petrochemical fittings, power plant and boiler valves, paper machines and high-temperature agitators. For water and light media the economical choice is tallow packing; for clean media and food, PTFE Teflon packing.

Sizing and installation

The cross-section is determined by (Box bore − Shaft diameter) / 2. Graphite packing settles slightly after gland adjustment; rings are cut at 45°, installed with joints staggered by 90°, and the gland is tightened gradually. In steam valves, re-tighten after the first heat-up. Reinforced types are for hardened steel stems and housings.

Production and quality

Graphite packing is produced in our own factory; yarn density, section tolerance and sulphur/chloride content are checked on every batch. Shipped from stock, exported to more than 15 countries. From gland packing to gasket sheet, from O-rings to copper washers: cover your plant's entire sealing needs from a single supplier.

Applications

High-temperature and high-pressure valves, steam valves
Hot oil, steam and condensate lines
Refineries, petrochemical plants and power stations
Paper mills and hydroelectric plants
High-temperature agitators and pumps
Expansion joints and boiler fittings

Frequently asked

How do I determine the packing size?: The cross-section equals half the difference between the stuffing box bore and the shaft diameter: (bore − shaft) / 2. For a 60 mm bore and 40 mm shaft, a 10 × 10 mm square section is used. If unsure, send us your dimensions.
What are the minimum order quantity and lead time?: Standard sections ship from stock in boxes from 1 kg. Custom sections, lengths or impregnations are produced on short lead times. We organise domestic and export shipments.

Technical data

Material	Low-sulphur expanded pure graphite yarn; optional Inconel / stainless wire or glass fibre reinforcement
Temperature	−200 °C / +450 °C (+650 °C in steam, non-oxidising media)
Pressure	Pumps 30 bar · Valves 250 bar
pH range	0 – 14
Shaft speed	20 m/s
Cross-sections	3 × 3 mm – 50 × 50 mm (square)
Corrosion inhibitor	Variant with corrosion inhibitor giving cathodic protection to stems and glands
Packaging	1, 2 and 5 kg boxes or spools; pre-cut rings

Values are general guidance; temperature, pressure and speed should not be applied at their maximum simultaneously. Share your operating conditions for an application-specific selection.