Richter – KN PFA Lined Ball ValveEnquire Now

Manual Richter KN ball valve with thick PFA lining for H2SO4 and ClO2 isolation

KN Manual Lever Operated

Richter KN valve with pneumatic actuator for automated chemical isolation

KN On/Off & Control

Cutaway of Richter KN showing PFA lining and ENVIPACK stem sealing system

KN Cut-Away

BRAND: RichterCATEGORY: Ball Valves, Control Valves, Lined Valves,

Modular Corrosion Protection. Reliable Isolation. Zero Maintenance Stem Seal.

The Richter KN PFA-lined ball valve is purpose-built for the toughest chemical applications—handling highly corrosive, ultrapure, or solids-laden media with ease. Its heavy-duty, modular design combines thick PFA or antistatic PFA-L lining, robust ductile iron or stainless steel body, and ENVIPACK stem sealing to deliver safe, leak-free operation over a wide temperature range from –60 °C to +200 °C.

For technicians, engineers, and production managers, this means:

Longer service life – Virtually maintenance-free stem sealing and self-adjusting ENVIPACK gland eliminate leaks and reduce manual intervention.
Reliable shut-off and control – PFA-lined one-piece ball/stem ensures consistent sealing with gas-tight PTFE seat rings.
Lower installation risk – Labyrinth-style body joint with “almost metal-to-metal stop” ensures long-term sealing, even under thermal cycling.
Application flexibility – Full modular system allows for shut-off, control, and drain configurations, with a range of ball types and actuator options.
Fewer spares, easier maintenance – Modular construction shares parts across KN, KNA, KNR, and KA-N series, reducing downtime and inventory.

With decades of proven performance in acid, HF, HNO₃, pickling, and ultrapure chemical services, the Richter KN series is the go-to choice when standard materials fall short.

Our Valve Repair Centres in Secunda and Durban provide expert repair, reconditioning, automation, and testing services, ensuring your Richter valves operate at peak performance.

Modular design. Superior sealing. Corrosion-proof peace of mind.

Download the Richter KN Technical Bulletin

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Specifications

Series	KN/KNA
Design	Heavy Duty PFA Lined Ball Valve
Features	ENVIPAK with active stainless steel packing gland follower is self adjusting and provides “Live loaded” stem sealing Leak tight to atmosphere and conforms with German Clean Air Act (TA-Luft) Resilient PTFE seat rings provide permanant pre-tension on the ball to provide a gas tight seal Blow out proof stem for operator safety One piece ball and stem as standard with 3mm lining and stainless steel core 3,5mm Thick walled lining made of pure PFA provides high permeation resistance and comes with vacuum proof anchoring to the body External corrosion protection is provided by epoxy coating and stuffing box, lever, screws and nuts are all made of stainless steel ISO mounting pad for easy mounting of actuators
Size Range	KN DN 15 – 200 / ½” – 8” KK DN 25 – 150 / 1″ – 6″
Pressure Rating	PN16 – 25 / ANSI 150
Temperatures	-60°C to 200°C
End Connections	KN Flanged / KK Wafer
Materials	PFA Lining (Standard) PFA-L antistatic lining (Optional)
Body Materials	Ductile Iron lined ASTM A395 Fully PFA Lined
Seat Materials	PTFE / Modified PTFE
Ball Materials	Stainless Steel Core lined with PFA / PFA-L
Options & Accessories	Manual, pneumatic actuators or electric actuators “V-Control ball” AL₂O₃ Ceramic ball 5 mm Pure PFA lining Full 316 SS body Bolt on steam jackets Valve positioners Switchboxes
Applications	Isolation, on/off and control for acids and other corrosive media throughout chemical process industries