NK, NKS, NKL Body lining PTFE Disc/stem unit PFA or stainless steel Compliant with German Clean Air Act Optional safety stuffing box
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1 Richter PFA/PTFE Shut-Off and Control Butterfly Valves NK, NKS, NKL Body linin PTFE Disc/stem unit PFA or stainless steel Compliant with German Clean Air Act Optional safety stuffin box
2 Richter wafer-style, lu-style and double-flane butterfly valves Fields of application Richter butterfly valves have proved successful in a wide variety of process plants. Also suitable for free-flowin, low-abrasive bulk materials in the version with a metallic disc/stem unit. Shut-off, throttlin and control of corrosive, hazardous and pure liquids, ases and vapours. FDA-compliant, wetted materials for in food processin, pharmacy and similar fields. The short face to face butterfly valves are advantaeous in confined spaces e.. under vessels. Butterfly valves are economical valves: easy to install and dismantle, attractively priced, compact. Operatin rane -0 to + C (-0 to 00 F) operatin temperature 0.1 mbar (0.00 psi) vacuum up to bar ( psi) operatin pressure Product features Soft-sealin and as-tiht, both with lined and metallic disc/stem units Leak-tiht aainst the atmosphere in acc. with the German Clean Air Act (TA-Luft) Optional with safety stuffin box Leakae rate in the seat to DIN EN 122, leakae rate A (formerly DIN T): as-tiht, 0 bubbles Almost equal-percentae characteristics Short face-to-face: ISO 72 series, API 9 Table 1, MSS SP-7 Table Flanes (with lu-style and double-flane bodies) for connection ISO 0-2 PN, ASME (ANSI) B1. Class, JIS R 22-K Wetted surfaces anti-adhesive thanks to PFA/PTFE Identification of the valves to DIN EN 19, ASME (ANSI) B1. Actuation: - hand-lever, lockable - worm ear with handwheel - pneumatic/electric actuators - valves with centerin ISO 211 Type codes, wetted materials manual actuation remote actuation Double-flane body NK/... NKP/... Wafer-style body NKS/... NKSP/... Lu-style body NKL/... NKLP/... Linin PTFE, disc/stem unit PFA.../F Linin PTFE/PFA antistatic.../f-l Alternative disc/stem unit of stainless steel.../...-s Dependin on the body version, the butterfly valves can be installed as a wafer-style valve ( sandwich-type butterfly valve ) with all three body versions or as a flane-mounted or dead-end butterfly valve with lu-style and double-flane body. See pae for installation examples. One-piece disc/stem unit Optional lined with pure PFA fluoroplastic The combination of a PFA disc/stem unit with a PTFE body provides very low friction values and torques durin the openin and closin processes, minimum wear and a lon service life. Optional antistatic PFA-L or hihly permeation-resistant PFA-P. Disc/stem core made of hihly torsion resistant Duplex stainless steel ASTM A 1 CD- MCu (1.17) Alternatively made of stainless steel CF8M (1.08) precision castin - polished sealin surfaces, thus very low friction values - polished disc surfaces on request - other materials (e.. Alloy) on request Thick-walled PTFE linin of the valve body Linin thickness -. mm ih permeation resistance Vacuum-proof Optionally TFM-PTFE and antistatic PTFE-L Wide sealin surfaces of the body linin for reliable sealin even with matin flanes with lare radii, e.. lass-lined components Permanently elastic seal in the valve openin by means of a standard silicone insert under the PTFE body linin. Optionally FKM insert (e.. Viton ) for use with moist chlorine as. 2
3 Maintenance-free and selfadjustin top and bottom stem sealin, therefore reliable even with many switchin cycles and fluctuatin temperatures - primary: body linin aainst disc/stem shoulder linin - secondary: O-rin FKM fluorocaoutchouc, optional FFKM TÜV-certified compliance with the German Clean Air Act (TA-Luft) also in standard version without safety stuffin box Optional safety stuffin box for use with environmentally hazardous media, independent action, can be adjusted manually from outside, on request with monitorin connection. Pressure-bearin shell made of ductile cast iron EN-JS 9 (ASTM A9), PN absorbs system and pipe forces centers the valve in the pipe. Lon valve neck permits optimal heat insulation without the installation of an elevated lever, additional stem extensions on request. Safety stuffin box 02/1 Monitorin connection External corrosion protection Epoxy coatin, nuts and bolts made of stainless steel. Chlorine electrolysis options Specially for use with moist chlorine as: Elastic insert made of Viton instead of silicone Body linin of particularly permeation-proof, modified TFM- PTFE instead of standard PTFE Body screws and nuts made, for example, of steel instead of stainless steel Wafer-style body NKS Lu-style body NKL Double-flane body NK
4 Connectin dimensions, flow rates, torques Wafer-style body (NKS/NKSP series): -00 (2-) Lu-style body (NKL/NKLP series): -00 (2-) Double-flane body (NK/NKP series): - (2-1) Other nominal sizes on request. As the distance between the centre of ravity and the disc/stem unit increases, the actuator exerts an increasin bendin moment on the stem. Admissible actuator weihts on request. h Connection handwheel/worm ear in standard version (top) and in the version with safety stuffin box (bottom). e u c Ø S SW b e K M 8 Connection to DIN / ISO 211 / p m n x d s I C E t F F r Test medium for torques: water C (8 F). The torques may be hiher dependin on the medium, e.. dry ases, viscous or crystallisin liquids. L L G T A B k a Installation dimensions (mm) and approx. weihts (k) L B NKS/NKL BNK E T K (ISO) nxd(iso) 1) n 2) K (ASME) nxd(asme) 1) n 2) C F G ) A Ø S SW M NKS Weiht NKL NK x 19 x M1. x 19 x / x 19 8 x M1 2. x 19 x / x 19 8 x M x 19 8 x / x 2 8 x M x 22 8 x / x 2 8 x M x 22 8 x / x 2 12 x M 12 x 2 12 x 7 / x 2 12 x M 2 12 x 2 12 x 7 / x 2 1 x M 7 12 x x Flane connectin dimensions to ISO 0-2 PN and ASME (ANSI) 1. Cl. 1) Flane throuh holes 2) Tapped holes metric or UNC ) Dimension G only applies to double-flane bodies Weiht (k) with free shaft end (without lever, bracket etc.) x 28 1 x M2 1 x x Connectin dimensions (mm) for remotely actuated version Conn. dim.* F07 * to DIN/ISO 211 F07 F07 F F F12 1 F12 1 F1 00 F1 and lever dimensions (mm) and approx. weihts (k) a l h Weiht Worm ear 00 Worm ear dimensions (mm) and approx. weihts (k) b c e k m p r s t u Weiht Anle of openin Torques (Nm) Md Md adm Flow rates (m /h) and z-values Md adm = max. admissible torque (Nm) with the disc/stem unit blocked. kv-values (m /h) Conversion to Cv = k v x 1. (US pm) = k v x (IMPpm) z-values at 7 % flow
5 Pressure/temperature rane* Vacuum in mbar Gaue pressure in bar Temperature in F Temperature in C * Special stainless steel core material with temperatures below - C (- F) Option: manual actuation with limit switch Inductive or mechanical, connection in acc. with VDI/VDE 8, alternatively freely mounted sensors Components and materials Item / Vacuum in psi Gaue pressure in psi ISO Desination Standard desin Special desin Shell Ductile cast iron EN-JS 9 (ASTM A9) Disc/stem unit, one-piece Disc/stem core Duplex stainless steel Core stainless steel CD- MCu with temp. ASTM A1 CD- MCu (1.17), linin PFA < - C/- F, linin PFA-L antistatic, PFA-P hihly permeation-resistant Guide pin ( / ) Stainless steel and lever Stainless steel CF8 (1.08) Plain bearin PTFE-lined (triple bearin) O-rin FKM (Viton or equivalent), top and bottom FFKM (Kalrez or equivalent) Packin rins (see pae ) PTFE (only with safety stuffin box) Thrust rins Stainless steel (top and bottom) Body linin PTFE TFM-PTFE, PTFE antistatic Pressure asket Aramide Sealin foils PTFE (only with safety stuffin box) Packin land follower (see pae ) Stainless steel (only with safety stuffin box) Bracket Connection to DIN EN ISO 211 and Namur Special desin on request Scraper rin Fluororubber no need if safety stuffin box installed Cup sprin assembly Stainless steel (top and bottom) Throttlin plate with scalin Stainless steel Flexible insert Silicone FKM (Viton or equivalent) Groundin cable Stainless steel Safety stuffin box, disc (see pae ) PTFE, stainless steel Monitorin connection (see pae ) Only in conn. with safety stuffin box Couplin Stainless steel Special desin on request Actuator Pneumatic quarter-turn actuators Pneumatic or electric actuators e.. Richter RA, bar, Norbro, El-o-matic, AMG, AirTorque etc. of various makes Worm ear with handwheel Body EN-GJL (GG-) with epoxy coatin Body ductile cast iron, (not illustrated, see pae ) aluminium stem with O-rin sealin, stem and bolts stainless steel Stem extension, not illustrated Desin on request Screws, nuts, washers Stainless steel Other materials, e.. A19 Gr. B7M
6 Installation examples Wafer-style body The flaneless butterfly valve is secured between two flanes by pipe bolts. Dependin on the body version, the Richter butterfly valves can be installed as a wafer-style butterfly valve ( sandwich-type butterfly valve ) with all three body versions or as a flane-mounted or dead-end butterfly valve with lu-style and double-flane body. See pae for flane holes and threads for connection to ISO, ASME (ANSI) and JIS. Lu-style body Lued options Tapped holes: The butterfly valve is installed as a dead-end or flane-mounted valve. The pipe side to be dismantled can be removed without any axial displacement, the butterfly valve acts as a dead-end valve. Throuh holes: The butterfly valve is centered in the holes by pipe throuh bolts and secured by the pipe flanes. Kalrez, Viton : Trademark of Du Pont Richter: Trademark of Richter Chemie-Technik Gmb Presented by: lass metal On request collar bush instead of tapped hole. Double-flane body Flaned options Throuh holes: The butterfly valve is centered as a waferstyle valve by means of pipe throuh bolts in the holes. Alternatively, it can be installed as a dead-end valve with a nut inserted between the valve flanes. Tapped holes: The valve is installed as a dead-end or flane-mounted valve. The pipe side to be dismantled can be removed without any axial displacement. Glass connection: On the lass side, tapped holes or throuh holes with collar bush. Richter Chemie-Technik Gmb Otto-Schott-Str. 2, D-790 Kempen, Germany Tel. +9 (0) 21 2/1-0, Fax +9 (0) 21 2/ richter-info@idexcorp.com Publication No. 19en 0.09 Richter Chemie-Technik Gmb. Subject to chane without notice. Printed in Germany.
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