Pump & Valve Seals

Valve Stem Packing

Industrial valve stem packing in graphite, PTFE and reinforced materials. Braided packing, die-formed rings and custom sealing sets for industrial valves.

Custom sizes, materials and profiles available
Reliable sealing performance under demanding conditions
Export-ready packing and documents

1. General Specifications

Parameter	Specification
Product Name	Valve Stem Packing
Product Type	Compression Packing / Valve Gland Packing
Sealing Function	Valve Stem Leakage Control
Material Options	Flexible Graphite / PTFE / Reinforced Graphite
Packing Construction	Braided / Die-Formed Rings / Cut Rings
Cross-Section	Square / Custom Profiles
Reference Temperature (PTFE)	Up to +260°C (Material Limit; Application Dependent)
Reference Temperature (Graphite)	Up to +450°C in Selected Oxidizing Environments
High-Temperature Graphite Options	Up to +650°C in Selected Steam Services
Reference Valve Pressure	Up to 345 bar (Selected Reinforced Graphite Designs)
Motion Type	Rotary / Rising Stem
Dimensions	Packing Cross-Section × Length / Ring Dimensions
Supply Form	Coils / Cut Rings / Preformed Sets
Applications	Gate Valves / Globe Valves / Control Valves
Customization	Material / Cross-Section / Ring Dimensions
MOQ	Flexible

2. Packing Material Options

Material	Main Characteristics	Typical Applications
Flexible Graphite	Good thermal stability and compressibility for elevated-temperature sealing	Steam Valves / Process Valves
Reinforced Graphite	Improved mechanical strength and extrusion resistance	High-Pressure / High-Temperature Valves
Braided PTFE	Low friction and broad chemical resistance	Chemical Valves / Water Treatment
Graphite-Impregnated Fiber	Combination of flexible packing structure and lubricating characteristics	General Industrial Valves
Die-Formed Graphite Rings	Consistent ring geometry and good compressibility	Valve Stuffing Boxes / Packing Sets

3. Supply & Configuration Options

Configuration	Description	Typical Applications
Braided Packing Coil	Continuous braided packing cut to the required length	Valve Maintenance / General Replacement
Cut Packing Rings	Individual rings prepared for specified stuffing box dimensions	Industrial Valve Repair
Die-Formed Packing Rings	Pre-compressed rings manufactured to defined dimensions	High-Temperature Valve Assemblies
Reinforced End Rings	Stronger rings used to support selected packing sets	High-Pressure Valve Service
Custom Packing Set	Multiple rings supplied as a matched set	OEM / Specialized Valve Applications

Valve Stem Packing is designed to control fluid or gas leakage along valve stems in industrial valves. Installed inside the valve stuffing box and compressed by the packing gland, it creates a sealing barrier while allowing the valve stem to rotate or move axially during operation.

Valve stem packing is widely used in gate valves, globe valves, control valves and other industrial valves handling water, steam, oils, chemicals and process fluids.

Features & Advantages

Reliable Stem Sealing: Helps reduce external leakage around valve stems under suitable operating conditions.
Multiple Material Options: Available in flexible graphite, PTFE, graphite-impregnated fibers and reinforced packing constructions.
High-Temperature Options: Graphite-based packing is suitable for selected high-temperature steam and process applications.
Chemical Resistance: PTFE packing provides broad resistance to many industrial chemicals.
Adjustable Compression: Gland compression allows sealing contact to be adjusted according to installation and operating requirements.
Standard & Custom Sizes: Available in different cross-sections, packing lengths and preformed ring configurations.

Materials & Construction

Flexible graphite packing is commonly selected for elevated-temperature valve applications, including steam and hydrocarbon service. Reinforced graphite packing may incorporate metal wire or other strengthening elements for improved extrusion resistance under demanding conditions.

PTFE packing provides low friction and chemical resistance for selected industrial valves operating within the material's temperature limits.

Packing can be supplied as braided packing in coils, cut rings or die-formed sealing rings, depending on the valve design and maintenance requirements.

Typical Applications

Gate valves and globe valves
Industrial control valves
Steam and thermal fluid systems
Chemical and petrochemical processing
Power generation equipment
Water treatment and industrial utilities
Valve maintenance and replacement

Standard & Custom Supply

CORA SEALS supplies valve stem packing in different materials, cross-sections and configurations for valve manufacturers, industrial distributors and maintenance contractors.

For quotations, please provide the valve type, stem diameter, stuffing box dimensions, packing material and quantity. Operating pressure, temperature, fluid type and emission-control requirements are also important when selecting suitable packing.

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