Data Sheet * * Fill Level Limiter. Application. Main Features. Design and Mode of Operation. Functional Schematic

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1 * * D_EN_NK10_SIL Rev.A 10/11 * * ca. 60 mm ca. 10 mm d e v e l o p i n g s o l u t i o n s Data Sheet NK10 Fill Level Limiter Application The NK10 fill level limiter is used in thermotechnical and process plants as a safeguard against the fill level falling elow the lowest permissile level. As a limiter the device conforms to the requirements of DIN The devices in this series are... EN certified under no. Z for SIL1 and SIL2 (SIL3 for redundant circuitry) y the German inspection authority TÜV Süd. DIN certified under the registration numer 1D016/07. The conformity assessment was made y the DIN Certco company for conformity assessment certified under EC guideline 97/23/EC with certificate no Z 0063/2/1. The ECtype examination test was carried out y the German inspection authority TÜV Nord Plant Engineering. GL HH certified. The certification was made y Germanischer Lloyd. Copies of the certificates and manufacturer's declarations can e found in the appendices to the operating manual. Design and Mode of Operation The swim system of the fill level limiter is contained in the fluid-filled reservoir (expansion tank). The swimming motions generated y changes in the fill level are transmitted directly to a microswitch y a swimmer rod sealed in stainless-steel ellows. The fulcrum of the swimmer rod is located outside of the pressure chamer. There is a test utton outside the pressure chamer with which a function check as per DIN can e made without lowering the fill level. When pressed, the ody of the swimmer is moved against its uoyancy. A locking and unlocking system as per DIN must e incorporated into the downstream electrical control if the device is used as a fill level limiter. This safety system must conform to DIN / VDDE Main Features Temperature staility up to 400 C Parts that come into contact with media made of stainless steel Doule-walled stainless-steel ellows Heat-resistant finish Functional Schematic Swimmer Welding sockets Counterflange Switch lever Microswitch Metal ellows Swimmer rod Cale gland Test utton M16 x 1.5

2 Technical Data Variants NK101 NK102 NK103 NK104 NK105 NK106 NK107 NK10A NK10 Max. operating pressure 20 ar 20ar 10ar 16ar 16ar 20ar 20ar 10ar 20ar Max. temperature of medium 400 C 400 C 350 C 400 C 400 C 400 C 400 C 350 C 400 C Permissile amient temperature 70 C Variants NK10F NK10G NK10H NK10K NK10M NK10N NK10P Max. operating pressure 20 ar 20 ar 20 ar 150ls 300ls 300ls 300ls Max. temperature of medium 400 C 400 C 400 C 400 C 400 C 400 C 400 C Permissile amient temperature 70 C General Data Max. load data 250 VAC, 6A resistive load 250 VDC, 250mA resistive load Electrical connection Inner terminal strip Protection class IP55 as per DIN EN Specific minimum density ρ=0.6 kg/dm 3 Switch hysteresis Installation position approx. 6 mm Horizontal Switching point differential Switching point differential on the medium surface All variants with 2 microswitches max. 30 mm dependent on medium density Materials Swimmer system Stainless steel Metal ellows Stainless steel Welding sockets St 35.8 Flange (H II) or 15Mo3 and Configuration 1001 Configuration 1002 Functional Safety SIL 1/2 SIL 3 Wiring Diagram 1 Switch (S1) Connection Diagrams for SIL Applications: Test utton -S1 2 Switch (S1 with warn switch S2) Test utton

3 Ød Ø110 Ø94 D ØC Dimensional Drawings Variants Flange A C D NK x 77.8 NK x 90 ca. 110 A Variants Flange Connecting dimensions D LK d Numer of NK DN62 PN Ø62 ca. 240 ca. 385

4 Ød Ød Variants Flange Connecting dimensions D LK d Numer of NK Type 1 DN80 PN NK10G Type 1 DN80 PN ca. 220 ca. 365 Variants Flange Connecting dimensions D LK d Numer of NK Type 1 DN65 PN NK Type 1 DN65 PN NK Type 1 DN65 PN Ø62 ca. 240 ca. 385

5 Ød Ø106 Ød Ø120 Ø106 Variants Flange Connecting dimensions D LK d Numer of NK10F Type C DN80 PN ca. 220 ca. 365 Variants Flange Connecting dimensions D LK d Numer of NK10H Type G DN80 PN ca. 220 ca. 365

6 Ød Ød Ø110 Ø94 Variants Flange Connecting dimensions D LK d Numer of NK DN65 PN Ø62 ca. 240 ca. 385 Variants Flange Connecting dimensions D LK d Numer of NK10P ANSI ls NK10N ANSI ls NK10M ANSI ls NK10K ANSI ls ca. 220 ca. 385

7 Order codes Fill Level Limiter NK U0600 Series Flange DIN EN Type 1 DN65 PN > 1 Flange DIN EN Type 1 DN80 PN > 2 Flange DIN EN Type 1 DN65 PN > 3 Flange DIN EN Type C DN65 PN > 6 Flange DIN EN Type 1 DN65 PN > 7 Welding connection mm (S80)... > 4 Welding connection mm (S90)... > 5 Flange DIN EN Type C DN65 PN > A Flange DIN EN Type D DN65 PN > Flange DIN EN Type C DN80 PN > F Flange DIN EN Type 1 DN80 PN > G Flange DIN EN Type G DN80 PN > H Flange ANSI ls > K Flange ANSI ls > M Flange ANSI ls > N Flange ANSI ls > P Switching Elements 1 Switch... > 1 2 Switch... > 2 Design Functional safety as per IEC 61508/61511 (SIL 1/2/3) U0600

8 Technische Änderungen vorehalten Suject to change without notice Changements techniques sous réserve Fischer Mess- und Regeltechnik GmH ielefelder Str. 37a D ad Salzuflen Tel Fax