PFA/PTFE Shut-Off and Control Butterfly Valves NKS, NKL
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Richter PFA/PTFE Shut-off and Control Butterfly Valves Body lining PTFE, modified PTFE, PTFE-L, PE-UHMW Disc/stem unit PFA, PFA-L, stainless steel, Hastelloy®, titanium, special metals 50-1000 mm (2-40“)

Richter wafer-style and lug-style butterfly valves Fields of application Richter butterfly valves have proved successful in a wide variety of process plants. • Shut-off, throttling and control of corrosive, hazardous and pure liquids, gases and vapours, e.g. - wet Cl2 gas and NaOH in chlor-alkali electrolysis - large flows in the distribution and treatment of H2SO4, HCl, NaOH, NaOCl, chemical effluent etc. • FDA-compliant, wetted materials for use in food processing, pharmacy and similar fields. • Also suitable for free-flowing, low-abrasive bulk materials in the version with a metallic...

© Double-action, maintenance-free and self-adjusting top and bottom stem sealing, therefore reliable even with many switching cycles and fluctuating temperatures: - primary: body lining against disc/stem shoulder - secondary: O-ring FKM, optionally FFKM Compliant with the German Clean Air Act even in the standard version without safety stuffing box © Pressure-bearing body made of ductile cast iron EN-JS 1049 (0.7043)/ASTM A395 • Absorbs system and pipe forces • Centers the valve in the pipe • Optionally body made of stainless steel or carbon-fibre/glass-fibre-reinforced vinyl ester © Long...

NKS, NKL + NKS-C, NKL-C Components, materials and options for valves with a PFA-lined disc Components and materials Item Designation Standard design Standard design DN 50-400 (2-16“) DN 65,125,450-750 (21/2“, 5“, 18-30“) 120 Body (shell) Ductile cast iron EN-JS 1049 (0.7043)/ Ductile cast iron EN-JS 1049/ ASTM A395 ASTM A395 221 Disc/stem unit, one-piece Disc/stem core Duplex stainless steel Disc/stem core stainless steel 1.4435, 1.4517 (CD-4 MCu), PFA-lined PFA-lined 229 Guide pin Stainless steel (DN ≤ 150/6“) – 235 Hand lever (DN 50-200/2-8“) Stainless steel Stainless Steel 300 Plain...

NKS-C, NKL-C Components, materials and options for valves with stainless steel / Hastelloy® C /titanium disc © Disc/stem unit plastic-lined or metallic • PFA-lined, PFA antistatic, stainless steel, Hastelloy® C22, titanium gr. 2 © Body lining PTFE • Highly corrosion-resistant, vacuum-proof • Optionally modified PTFE, PTFE antistatic, PE-UHMW © Permanently elastic seal in the valve passage by means of silicone insert • Optionally FKM insert (e.g. Viton®) © Self-adjusting, maintenance-free stem sealing • Leak-tight against atmosphere, German Clean Air Act (TA Luft) • Double-acting with...

1) Dimension G only applies to double-flange bodies Connection dimensions (mm) for remotely actuated version DN

PTFE butterfly valves with PFA-lined disc Worm gear dimensions (mm) and approx. weights (kg) * for valves with safety stuffing box Construction worm gear for butterfly valve with safety stuffing box Mdadm = max. admissible torque (Nm) with the disc/stem unit blocked Flow rates (m3/h) and z-values Pressure/temperature range NKS-C, NKL-C with PFA-lined disc Body lining modified PTFE For low temperature applications please observe local regulations!

Pipeline connections and approx. weights (kg) Flange connecting dimensions to ISO 7005-2 PN 10 and ASME (ANSI) 16.5 Cl. 150, weight (kg) with bare shaft (without lever, bracket etc.) 1 Flange through holes on request 2) Tapped holes metric or UNC 3) DN 750 (30“) only to ASME/ANSI B16.5 Cl. 150 Connection dimensions (mm) for remotely actuated version

PTFE butterfly valves with stainless steel / Hastelloy® C / titanium disc Worm gear dimensions (mm) and approx. weights (kg) Pressure/temperature range NKS-C, NKL-C with disc made of stainless steel, Hastelloy® C, titanium Temperature °C For low temperature applications please observe local regulations!

NKS, NKL, NKS-C, NKL-COverview of Richter butterfly valves with wafer-style and lug-styleBody/Shell: Ductile cast iron1) Wafer-style body DN 50-400 (2”-16”) Design Lug-style body DN 50-400 (2”-16”) Design Lug-style body DN 450-1000 (18”-40”) Design 1 optionally shell made of stainless steel and fibre-reinforced vinyl ester, available sizes on request 2) DN > 350 (14”) antistatic: Availability on request * Body lining PTFE, optional modified PTFE Process Pumps &. Valves Richter Chemie-Technik GmbH Otto-Schott-Str. 2, D-47906 Kempen, Germany Tel. +49(0)21 52/146-0, Fax +49(0)21...