Tuffy Liquid Level Switches

Transcription

1 Tuffy Liquid Level es Tuffy liquid level switches are designed for horizontal mounting in a tank or vessel through threaded or flanged pipe connections. Models are equipped with a single electric or pneumatic switch mechanism for high or low level alarm or control applications. Electric Models Features All 316 SS wetted components Cage pressures to 1500 psig (103 bar) NACE and ASME B31.3 construction Specific gravity as low as 0.4 Explosion proof NEMA 7/9 enclosure, optional 316 stainless steel mounting Process temperatures from: -40 F to +400 F (-40 C to +204 C) Choice of switch mechanism : Dry contact Hermetically sealed Pneumatic (3 port/2 position valve) Models available with FM, CSA, and CENELEC approvals Pneumatic Models Options Commercially constructed external cage with two 1" NPT top and bottom connections ANSI flanges Pigtail leads NACE or ASME B31.3 external cage with two 1" NPT top and bottom connections available. Consult factory Interface Applications Sour service (NACE) High/low alarm Day storage tanks Clean liquids Explosion proof areas Process vessels Worldwide level and flow solutions SM

2 Expedite ship plan Many Tuffy switches are available for quick shipment, usually within one week after factory receipt of purchase order, through the Expedite Ship Plan (ESP). The most popular models and options covered by ESP service are conveniently color coded below. To take advantage of ESP, simply match color coded model number codes and options; standard dimensions apply. Contact your local representative for lead times on other options and additional products. Selection data Part number construction Tuffy switches are identified by a ten digit numeric part number system comprised of five distinct components. A definition of each component is given at the right. The part number provides exact specifications of unit configuration, materials of construction, and other options vital to the performance and function of the instrument. 1 action mounting Agency approval 3 type 4 Housing 5 Specific gravity 1 action 4 Housing Electric 5 Pneumatic 6 ➀➁ ➀ Available with agency approval code 0 only. ➁ Available with housing code 0 only. 2 Agency approval FM/CSA 0 CENELEC 1 Carbon steel, 3 /4" NPT (316 SS for Pneumatic units) Stainless steel, 3 /4" NPT 1 Carbon steel, M20 x 1.5, CENELEC only 2 5 Specific gravity 0.60 minimum minimum 4 3 type Electric Rating Max. Process vac vdc Temperature F C SPDT Micro SPDT Micro Form Z Micro SPDT Hermetic DPDT Micro ➂ Pneumatic, 3 port/2 position non-bleed valve ➂ DPDT switch option supplied with 21" wiring leads. 2

3 Principle of operation Figures 1 and 2 illustrate the simple rol operating principle. ing action is obtained through the use of a magnet which is attached to a float and a switching mechanism. These two basic component assemblies are separated by a non-magnetic, pressure tight barrier. Mechanism Actuating Arm Barrier (Non-ic) Figure 1 Low Level Mechanism Actuating Arm Barrier (Non-ic) Figure 2 High Level Mechanical specifications Agency approvals Process Temperature Ambient Temperature Pneumatic Supply Max. Leakage Rate Max. Air Flow Specification 0.6 SG 1500 psig at +400 F (103 bar at +204 C) 0.4 SG 500 psig at +400 F (34 bar at +204 C) -40 F to +400 F (-40 C to +204 C) Max. 100 F (38 C) with max. process temperature Vacuum to 200 psig (13.8 bar) maximum 0.5 SCFH ( psig (6.9 bar) 12.0 SCFH ( psig (6.9 bar) Specific Gravity 0.6 minimum or 0.4 minimum Materials of 316/316L SS wetted components Construction including NACE and ASME B31.3 Housing NEMA 7/9 carbon steel or 316 stainless steel Cage (optional) Carbon steel or stainless steel * Cage Rating Schedule psig at +400 F (103 bar at +204 C) Schedule psig at +400 F (69 bar at +204 C) Flange (optional) Rating 250 psig at +400 F (17 bar at +204 C) * NACE or ASME B31.3 external cage available. Consult factory. Agency Approval Models Class I, Groups C & D XX CSA Class II, Groups E, F & G XX XX Class I, Div. 1, Groups C & D FM XX Class II, Div. 1, Groups E, F & G XX XX XX CENELEC EEx d IIC T XX XX XX 3

4 Typical piping Shut off Valve Safety Check Valve Vessel C L C L C L 3/4" NPT Conduit Connection Shut off Valve Actuation Level Drain Valve Typical Piping Arrangement Figure 3 Optional cage When an application does not allow a Tuffy to be mounted directly into the pressure vessel, an optional cage is available for external mounting. NACE or ASME B31.3 cages are available by consulting the factory. Refer to page 5 for cage part numbers and dimensions. Cage Square Flange Interface Available where specific gravity of lower fluid is minimum Consult factory for ratings and dimensions. 4

5 Dimensional specifications inches (mm) Electric switch models (391) or (414) 8.91 (226) [Sp. Gr. 0.4 min.] size = 2.00 (51) Dia. x 5.12 (130) Long 7.96 (202) [Sp. Gr. 0.6 min.] size = 2.00 (51) Dia. x 4.57 (116) Long 2.88 (73) Dia. C L 3.00 (76) Max. Nozzle Length Actuates Rising Level 3.75 (95).75 (19) Minimum Falling Level Clearance Actuates 3/4" NPT Conduit Connection Housing Carbon Steel Pneumatic switch models (304) or (329) 1/4" NPT Inlet (B) 1/4" NPT Inlet (A) 2.50 (64) Dia. C L 8.91 (226) [Sp. Gr. 0.4 Min.] Size = 2.00 (51) Dia. x 5.12 (130) Long 7.96 (202) [Sp. Gr. 0.6 Min] Size = 2.00 (51) Dia. x 4.57 (116) Long 3.00 (76) Max. Nozzle Length.75 (19) Actuates Rising Level 3.75 (95) Minimum Falling Level Clearance Actuates 1/4" NPT Outlet (C) Optional accessories Cage (2) 1" NPT 6.40 (163) ±.12 (286 ± 3) 1.31 (33) 4.50 (114) Dia (33) Square Flange 0.56 (14) Dia. Holes [4] on 3.62 (92) B.C (89) 3.50 (89) Flange Part No Flange Rating: F ( C) Cage Part Number Chamber Construction Temp " Sch. 80 (Carbon steel) 1500 psig (103 bar) " Sch. 80 (Stainless steel) +400 F " Sch. 40 (+204 C) (Carbon steel) " Sch. 40 (Stainless steel) 1000 psig (69 bar) ASME Flange (Consult factory when ordering) * Note: NACE or ASME B31.3 external cage with two 1" NPT top and bottom connections available. Consult factory. 5

6 Product warranty All rol mechanical level and flow controls are warranted free of defects in materials or workmanship for five full years from the date of original factory shipment. control, the cause of the claim is determined to be covered under the warranty; then, rol will repair or replace the control at no cost to the purchaser (or owner) other than transportation. rol shall not be liable for misapplication, labor claims, direct or consequential damage or expense arising from the installation or use of equipment. There are no other warranties expressed or implied, except special written warranties covering some rol products. If returned within the warranty period; and, upon factory inspection of the Quality assurance The quality assurance system in place at rol guarantees the highest level of quality throughout the company. rol is committed to providing full customer satisfaction both in quality products and quality service. rol s quality assurance system is registered to ISO 9001 affirming its commitment to known international quality standards providing the strongest assurance of product/service quality available. Assured quality & service cost less 5300 Belmont Road Downers Grove, Illinois Fax website Dorman Road Mississauga, Ontario L4V-1H Fax Heikenstraat 6 B 9240 Zele, Belgium Telex Fax Regent Business Ctr., Jubilee Rd. Burgess Hill, Sussex RH15 9TL U.K Fax rol International, Incorporated. All rights reserved. Printed in the USA. rol and rol logotype are registered trademarks of rol International. Performance specifications are effective with date of issue and are subject to change without notice. The brand and product names contained within this document are trademarks or registered trademarks of their respective holders. BULLETIN: EFFECTIVE: June 1998 SUPERSEDES: June 1997