Pump & Valve Seals

Valve Seat Seals

Valve seat seals in PTFE, reinforced PTFE, PEEK, NBR, EPDM and FKM. Custom sealing rings for ball valves, butterfly valves and industrial fluid control.

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 Seat Seals
Product Type	Soft Valve Seat / Valve Sealing Ring
Sealing Function	Valve Shut-Off / Internal Leakage Control
Material Options	PTFE / Reinforced PTFE / PEEK / NBR / EPDM / FKM
Seal Construction	Machined Polymer Ring / Molded Elastomeric Seat
Reference Temperature (PTFE)	Up to +260°C (Material Limit)
Reference Temperature (PEEK)	Up to +250°C (Selected Grades)
Reference Temperature (NBR)	-30°C to +100°C
Reference Temperature (EPDM)	-40°C to +150°C (Selected Grades)
Reference Temperature (FKM)	-20°C to +200°C (Selected Grades)
Pressure Rating	According to Valve Design / Material / Temperature
Sealing Arrangement	Unidirectional / Bidirectional Options
Available Sizes	Standard and Custom Valve Seat Dimensions
Dimensions	Inside Diameter × Outside Diameter × Profile Dimensions
Applications	Ball Valves / Butterfly Valves / Industrial Process Valves
Customization	Material / Dimensions / Seat Geometry
MOQ	Flexible

2. Material Options

Material	Main Characteristics	Typical Applications
Virgin PTFE	Low friction and broad chemical resistance; deformation under load must be considered	Chemical Ball Valves / General Process Equipment
Reinforced PTFE	Improved mechanical strength and resistance to deformation depending on filler	Industrial Ball Valves / Higher-Load Applications
PEEK	High mechanical strength, good dimensional stability and elevated-temperature capability	High-Pressure / Demanding Process Valves
NBR	Good oil resistance and flexible sealing performance	Oil-Compatible Valve Applications
EPDM	Good water, ozone and weather resistance	Water Treatment / Butterfly Valves
FKM	Good resistance to many oils, fuels and chemicals at elevated temperatures	Chemical / Industrial Process Valves

3. Valve Seat Design Options

Seat Design	Main Characteristics	Typical Applications
PTFE Ball Valve Seat	Low-friction polymer sealing ring	Standard Ball Valves
Reinforced PTFE Seat	Filled PTFE construction with improved mechanical properties	Industrial / Process Ball Valves
PEEK Valve Seat	High-strength engineering polymer sealing element	High-Load / Specialized Valves
Elastomeric Seat	Flexible rubber sealing contact	Butterfly Valves / Water Systems
Custom Machined Seat	Non-standard polymer seat manufactured from drawings	OEM / Valve Replacement

Valve Seat Seals are designed to provide shut-off sealing between a valve closure element and its mating seat. These components help prevent internal leakage when a valve is in the closed position and are essential for reliable fluid control in industrial piping and process systems.

Valve seat seals are commonly used in ball valves, butterfly valves and other industrial valve assemblies handling water, oils, gases and chemical media.

Depending on the valve design, seat sealing elements may be manufactured from elastomers, PTFE-based materials or engineered thermoplastics.

Features & Advantages

Reliable Shut-Off Sealing: Helps reduce fluid or gas leakage across closed valve surfaces.
Multiple Material Options: Available in PTFE, reinforced PTFE, PEEK, NBR, EPDM and FKM.
Chemical Resistance: PTFE and suitable engineered polymers provide resistance to many industrial process fluids.
Wear-Resistant Designs: Reinforced PTFE and PEEK offer improved mechanical performance in selected valve applications.
Soft-Seated Valve Applications: Elastomeric and polymer seat materials provide conformable sealing contact.
Custom Seat Profiles: Different dimensions and sealing geometries can be manufactured according to valve specifications.

Materials & Construction

PTFE valve seat seals are widely used in industrial ball valves due to their low friction and broad chemical resistance.

Reinforced PTFE compounds incorporate fillers to improve mechanical strength, deformation resistance and wear characteristics.

PEEK offers high mechanical strength and improved dimensional stability under elevated temperatures and loads, making it suitable for selected demanding valve applications.

NBR, EPDM and FKM elastomers are also used in valve seat sealing systems, particularly where flexible sealing contact is required.

The correct material depends on the process medium, valve pressure class, operating temperature, closure movement and valve seat geometry.

Valve Seat Design Options

PTFE Ball Valve Seats

Used in soft-seated ball valves to provide sealing contact between the ball and valve seat.

Reinforced PTFE Seats

Selected for applications requiring improved deformation resistance and mechanical stability.

PEEK Valve Seats

Used in selected high-load or elevated-temperature valve applications where conventional PTFE may not provide sufficient mechanical strength.

Elastomeric Valve Seats

Commonly used in butterfly valves and other suitable fluid control valves where resilient sealing contact is required.

Typical Applications

Industrial ball valves
Butterfly valves
Chemical processing valves
Water treatment systems
Oil and gas processing equipment
Industrial fluid distribution
Pneumatic and process control systems
Valve maintenance and replacement

Standard & Custom Supply

CORA SEALS supplies valve seat seals in various materials, sizes and sealing profiles for valve manufacturers, industrial distributors and aftermarket replacement applications.

Standard and custom seat designs can be sourced according to valve drawings, existing samples or technical specifications.

For quotations, please provide the valve type, nominal size, seat dimensions, material and required quantity.

Working pressure, operating temperature, process medium and applicable leakage requirements should also be specified to help confirm the appropriate seat material and design.

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