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1/32Registered Quality System to ISO 9001:2000 Form 216www.sorinc.com 913-888-2630 Pressure and Vacuum Switches for Process Applications Form 216 SOR® Pressure Switches are rugged fi eld-mounted instruments. The pressure sensing element of the SOR pressure switch is a force-balance, piston-actuated assembly. The sensing element is sealed by a fl exible diaphragm and a static o-ring. A wide selection of wetted parts materials for media compatibility and containment are available. A metal diaphragm may be welded to the pressure port for certain applications, thereby eliminating the o-ring. Application Information The SOR pressure switches in this catalog are suitable for a variety of process applications. Basic models with standard wetted parts are normally suitable for air, oil, water and non- corrosive processes. See the Quick Selection Guide on pages 4 and 5. Specifi c application requirements can normally be met by selecting optional components, such as switching elements, diaphragm systems and pressure ports. See How to Order on page 3. Certain applications may require customized specials. Consult the SOR representative in your area or the factory. This catalog describes switches that are: • General Purpose • Weathertight • Conventional Explosion Proof Other specifi c types of switches available through your SOR representative are: • Hermetically Sealed (for hazardous locations) • Pivot Seal (for high shock pressures and cycle rates) • Differential Pressure • Temperature (remote and direct mount) • Electronic and Mechanical Level • Electronic Pressure 12L 6B3 6NN Registered Quality System to ISO 9001:2000 913-888-2630www.sorinc.com Registered Quality System to ISO 9001:20002/32 Form 216 www.sorinc.com 913-888-2630 F e a tu re s a n d B e n e fi ts Features Pressure and Vacuum Switches Complete Product Line z Standard models and customized specials cover pressure range from 30 inches Hg VAC to 4000 psi. Robust Construction z Rugged, high-cycle rate tolerance, long life, not critical to vibration, high overrange and proof pressures, excellent corrosion resistance to hostile environments. Instrument Quality z High resolution of Set Points, high repeatability, narrow dead band, negligible temperature effect. Wetted Parts z Wide selection materials, process connection confi gurations and sizes. Optional “fi re-safe” pressure sensor. Snap-Action Electrical Switching z Wide selection UL Listed and CSA Certifi ed switching elements for AC and DC service. Optional “hermetically sealed” capsule for hazardous and hostile environments. Field Adjustable z Self-locking adjustment, no special tools required. No-charge factory calibration. Cost Effective z Simple and fast installation without special tools, long service life, no required periodic service or spare parts. UL Listed, CSA Certifi ed, ATEX Certifi ed, FM, TIIS Approved Models z Meets most code and customer requirements. Built-In Quality z Rigid quality standards maintained from raw material to fi nished product. Service z Factory sales engineers and area SOR representatives provide effective and prompt worldwide service. Delivery z Routine shipments 7 to 10 working days. Emergency shipments via same day air. Warranty z 3 years from date of manufacture. 3/32Registered Quality System to ISO 9001:2000 Form 216www.sorinc.com 913-888-2630 Quick Selection Guide Basic SOR pressure switches with standard wetted parts are normally suitable for air, oil, water and non-corrosive processes. The Quick Selection Guide on pages 4 and 5 shows these basic SOR pressure and vacuum switches. Corrosive service and particular customer requirements may require optional components. Refer to How to Order section below to build a customized model number or the dedicated page to locate optional components, such as switching elements, diaphragm systems, pressure ports and accessories. Each position in the model number, except Accessories, must have a designator. Design and specifi cations are subject to change without notice. For latest revision, see www.sorinc.com. 6NN-K5-M4-C2A-YY Model Number System DiaphragmHousingPiston Switching Element Range Spring Pressure Port Accessories Applications SOR pressure switches in this catalog are suitable for a wide variety of continuous pressure applications. Specifi c application requirements can normally be met by selecting optional components, such as, switching elements, diaphragm systems and pressure ports. Certain applications may require customized specials. Consult the SOR representative in your area or the factory. How to Order Information and data in this catalog are formatted to provide a convenient guide to assist instrument engineers, plant engineers and end users in selecting pressure switches for their unique applications. Steps 1 through 5 are required. Step 6 is optional. Orders must have complete Model Numbers, i.e. each component must have a designator. Step 1: Select Piston-Spring adjustable range/Set Point from Specifi cations (pages 7 & 8). (Piston/Spring combination determines adjustable range.) Step 2: Select Housing for type of pressure switch and service (page 9). Step 3: Select electrical Switching Element for electrical service (pages 10 & 11). Step 4: Select Diaphragm and O-Ring for process compatibility and containment (pages 12 & 13). Step 5: Select Pressure Port for process compatibility and connection (page 14). Step 6: Select Accessories required for service (page 16). How to Order Pressure and Vacuum Switches Registered Quality System to ISO 9001:20004/32 Form 216 www.sorinc.com 913-888-2630 Pressure and Vacuum Switches Quick Selection Guide - Pressure Explosion Proof Weathert ight Basic SOR pressure switches with standard wetted parts are normally suitable for air, oil, water and non-corrosive processes. Corrosive service and particular customer requirements may require optional components. Refer to How to Order on page 3 to locate optional components, such as, housing, switching elements, diaphragm systems, pressure ports and accessories. Each position in the model number, except Accessories, must have a designator. Weathert ight Explosion Proof Standard Construction • Housing: NN - aluminum; L - cast iron • Switching Element: SPDT; N - 10 amps @ 250 VAC; K - 15 amps @ 250 VAC • Diaphragm & O-ring: N4 - primary (wetted) diaphragm, TCP; o-ring (wetted) Buna-N • Pressure Port: 1/4” NPT(F); B1A - aluminum; F1A - carbon steel Notes 1. See balance of catalog for construction options. 2. Dead band values are expressed as typical expected at mid-range for a particular model number. See Dead Band Considerations on page 8. 3. Design and specifi cations subject to change without notice. For latest revision, see www.sorinc.com. Weathertight Model Number Adjustable Range (increasing pressure) psi (in. wc.) Typical Dead Band psi (in. wc.) Explosion-Proof Model Number 12NN - N66 - N4 - B1A (0.6 to 2.5) (0.4) 12L - N66 - N4 - B1A 12NN - K614 - N4 - B1A (2.5 to 45.0) (0.8) 12L - K614 - N4 - B1A 12NN - K2 - N4 - B1A 0.4 to 2.0 0.1 12L - K2 - N4 - B1A 12NN - K4 - N4 - B1A 0.5 to 6.0 0.1 12L - K4 - N4 - B1A 12NN - K5 - N4 - B1A 0.75 to 12 0.1 12L - K5 - N4 - B1A 12NN - K45 - N4 - B1A 1 to 16 0.15 12L - K45 - N4 - B1A Piston 12 Overrange 200 (psi) Proof 400 (psi) Weathertight Model Number Adjustable Range (increasing pressure) psi Typical Dead Band psi Explosion-Proof Model Number 4NN - K2 - N4 - B1A 2 to 8 0.2 4L - K2 - N4 - B1A 4NN - K4 - N4 - B1A 2 to 25 0.3 4L - K4 - N4 - B1A 4NN - K5 - N4 - B1A 3 to 50 0.4 4L - K5 - N4 - B1A 4NN - K45 - N4 - B1A 4 to 75 0.5 4L - K45 - N4 - B1A Piston 4 Overrange 750 (psi) Proof 1000 (psi) 5/32Registered Quality System to ISO 9001:2000 Form 216www.sorinc.com 913-888-2630 Pressure and Vacuum Switches Quick Selection Guide - Pressure Standard Construction • Housing: NN - aluminum; L - cast iron • Switching Element: SPDT; K - 15 amps @ 250 VAC • Diaphragm & O-ring: N4 - primary (wetted) diaphragm, TCP; o-ring (wetted) Buna-N • Pressure Port: 1/4” NPT(F); B1A - aluminum; F1A - carbon steel Notes 1. See balance of catalog for construction options. 2. Dead band values are expressed as typical expected at mid-range for a particular model number. See Dead Band Considerations on page 8. 3. Design and specifi cations subject to change without notice. For latest revision, see www.sorinc.com. Weathert ight Explosion Proof Explosion ProofWeathert ight Standard Construction • Housing: NN - aluminum; L - cast iron • Switching Element: SPDT; K - 15 amps @ 250 VAC • Diaphragm & O-ring: N4 - primary (wetted) diaphragm, TCP; o-ring (wetted) Buna-N. Piston 56 primary (wetted) diaphragm, 316SS. • Pressure Port: 1/4” NPT(F); B1A - aluminum; F1A - carbon steel Notes 1. See balance of catalog for construction options. 2. Dead band values are expressed as typical expected at mid-range for a particular model number. See Dead Band Considerations on page 8. 3. Design and specifi cations subject to change without notice. For latest revision, see www.sorinc.com. Quick Selection Guide - Vacuum Weathertight Model Number Adjustable Range (increasing pressure) psi Typical Dead Band psi Explosion-Proof Model Number 6NN - K2 - N4 - F1A 7 to 30 0.5 6L - K2 - N4 - F1A 6NN - K3- N4 - F1A 12 to 100 0.9 6L - K3 - N4 - F1A 6NN - K5- N4 - F1A 20 to 180 1.4 6L - K5 - N4 - F1A 6NN - K45- N4 - F1A 25 to 275 1.9 6L - K45 - N4 - F1A 5NN - K3- N4 - F1A 25 to 240 2.2 5L - K3 - N4 - F1A 5NN - K5- N4 - F1A 35 to 375 3.1 5L - K5 - N4 - F1A 5NN - K45- N4 - F1A 45 to 550 3.9 5L - K45 - N4 - F1A 9NN - K4- N4 - F1A 100 to 500 5.3 9L - K4 - N4 - F1A 9NN - K5- N4 - F1A 200 to 1000 9.2 9L - K5 - N4 - F1A 9NN - K45- N4 - F1A 200 to 1750 15 9L - K45 - N4 - F1A 1NN - K45- N4 - F1A 500 to 4000 98 1L - K45 - N4 - F1A Piston 6, 5 9 1 Overrange 1500 (psi) 2500 5000 Proof 2500 (psi) 6000 6000 Weathertight Model Number Adjustable Range Vacuum-O-Pressure in. Hg (in. wc) Typical Dead Band in. Hg (in. wc) Explosion-Proof Model Number 52NN - K116 - M4 - B1A (20 - 0 - 20) (0.9) 52L - K116 - N4 - B1A 52NN - K117 - M4 - B1A (40 - 0 - 40) (1.1) 52L - K117 - N4 - B1A 54NN - K117 - M4 - B1A 15 - 0 - 15 0.5 54L - K117 - N4 - B1A 54NN - K118 - M4 - B1A 30 - 0 0.5 54L - K118 - N4 - B1A 56NN - K216 - M2 - F1A 30 - 0 - 20 1.0 56L - K216 - M2 - F1A 56NN - K316 - M2 - F1A 30 - 0 - 160 1.4 56L - K316 - M2 - F1A Piston 52 54 56 Overrange 200 (psi) 750 1500 Proof 400 (psi) 1000 2500 Registered Quality System to ISO 9001:20006/32 Form 216 www.sorinc.com 913-888-2630 Pressure Switch A bi-stable electromechanical device that actuates/deactuates one or more electrical switching element(s) at a predetermined discrete pressure/vacuum (Set Point) upon rising or falling pressure/vacuum. Adjustable Range The span of pressure between upper and lower limits within which the pressure switch may be adjusted to actuate/deactuate. It is expressed for increasing pressure. Set Point That discrete pressure at which the pressure switch is adjusted to actuate/deactuate on rising or falling pressure. It must fall within the adjustable range and be called out as increasing or decreasing pressure. Dead Band The difference in pressure between the increasing Set Point and the decreasing Set Point. It is expressed as typical, which is an average with the increasing Set Point at mid-range for a pressure switch with the standard K switching element. It is normally fi xed (non-adjustable). Fire-Safe The ability of a welded seal pressure sensor to contain the process at elevated temperatures up to 1200°F at the rated overrange pressure, unsupported by the body of the pressure switch. Hermetically Sealed A welded steel capsule with glass-to-metal, factory-sealed electrical leads that isolates the electrical switching element(s) from the environment. Overrange The maximum input pressure that may be continuously applied to the pressure switch without causing permanent change of Set Point, leakage or material failure. Pressure and Vacuum Switches Glossary of Terms SOR recognizes that there is no industry convention with respect to terminology and defi nitions pertinent to pressure switches. This glossary applies to SOR pressure switches. Proof Pressure The maximum input pressure that may be continuously applied to the pressure switch without causing leakage or catastrophic material failure. Permanent change of Set Points may occur, or the device may be rendered inoperative. Repeatability The ability of a pressure switch to successively operate at a Set Point that is approached from a starting point in the same direction and returns to the starting point over three consecutive cycles to establish a pressure profi le. Repeatability on SOR switches will be smaller than 1% of full scale per ISA/ANSI S51.1. SPDT Switching Element Single-Pole, Double Throw (SPDT) has three connections: C — Common, NO — Normally Open and NC — Normally Closed, which allows the switching element to be electrically connected to the circuit in either NO or NC state. DPDT Switching Element DPDT is two synchronized SPDT switching elements which actuate together at increasing Set Point and deactuate together at decreasing Set Point. Discrete SPDT switching elements allow two independent circuits to be switched; i.e., one AC and one DC. The synchronization linkage is factory set, and is not fi eld adjustable. Synchronization is verifi ed by connecting test lamps to the switching elements and observing them go “On” simultaneously at actuation and “Off” simultaneously at deactuation. 7/32Registered Quality System to ISO 9001:2000 Form 216www.sorinc.com 913-888-2630 Pressure and Vacuum Switches Step 1: Piston/Spring 6NN-K5-M4-C2A-YY This table is a listing of piston-spring combinations and the corresponding adjustable ranges, dead bands, overrange and proof pressures. Adjustable range is expressed for increasing pressure; the Set Point must be within the adjustable range. Dead band is expressed as typical. See Dead Band Considerations on page 8. 1. Dead band values are expressed as typical expected at mid-range with the standard K switching element assembly installed. When optional switching elements are specifi ed, corresponding dead band multipliers shown on pages 8 and 10 must be applied. 2. The 12/66 piston/spring combination is available with the N switching element only. 3. Adjustable range becomes 10 to 45 in. wc whenever switching elements other than K, KA, W or D are used. 4. Special ranges may be possible. Consult the factory or the SOR representative in your area. 5. Diaphragms may have an additional effect on dead band. See page 13, Note 9. 6. Diaphragm life may be limited by using T or H switching elements with Numbers 1 and 9 pistons. 7. Metric bar (mbar) values are practical equivalents of the reference English values; not necessarily exact mathematical conversions. This data appears on the product nameplate when metric engineering units are specifi ed. 8. A breather drain (Accessory KK, see page 16) should be specifi ed when low pressure adjustable ranges are used in environments with signifi cant ambient temperature changes. 9. Filled isolators attached to the pressure switch will affect dead band. Piston-Spring Designators Adjustable Range4 Typical Dead Band1 Overrange Proof psi (in. wc) bar [mbar] psi (in. wc) bar [mbar] psi bar psi bar 12 - 662 (0.6 to 2.5) [1.5 to 6.2] (0.4) [1] 200 14 400 28 12 - 6143 (2.5 to 45) [6.2 to 110] (0.8) [2] 12 - 2 0.4 to 2.0 [30 to 140] 0.1 [7] 12 - 4 0.5 to 6.0 [35 to 415] 0.1 [7] 12 - 5 0.75 to 12 [50 to 830] 0.1 [7] 12 - 45 1 to 16 [70 to 1100] 0.15 [10] 4 - 2 2 to 8 [140 to 550] 0.2 [15] 750 50 1000 70 4 - 4 2 to 25 0.14 to 1.7 0.3 [20] 4 - 5 3 to 50 0.2 to 3.5 0.4 [30] 4 - 45 4 to 75 0.3 to 5 0.5 [35] 6 - 2 7 to 30 0.5 to 2 0.5 [35] 1500 100 2500 170 6 - 3 12 to 100 0.8 to 7 0.9 [60] 6 - 5 20 to 180 1.4 to 12 1.4 [95] 6 - 45 25 to 275 1.7 to 19 1.9 0.1 5 - 3 25 to 240 1.7 to 16 2.2 0.15 5 - 5 35 to 375 2.4 to 26 3.1 0.2 5 - 45 45 to 550 3.1 to 38 3.9 0.25 9 - 46 100 to 500 7 to 35 5.3 0.5 2500 170 6000 4109 - 56 200 to 1000 14 to 70 9.2 0.6 9 - 456 200 to 1750 14 to 120 15 1 1 - 456 500 to 4000 35 to 275 98 7 5000 340 6000 410 Registered Quality System to ISO 9001:20008/32 Form 216 www.sorinc.com 913-888-2630 Pressure and Vacuum Switches Step 1: Piston/Spring This table is a listing of piston–spring combinations and the corresponding adjustable ranges, dead bands, overrange and proof pressures. SOR vacuum switches are compound; they will operate in either vacuum or pressure modes. Adjustable range is expressed from maximum vacuum decreasing to zero gauge and increasing to maximum pressure. Dead band is expressed as typical. See dead band considerations below. The Set Point must be within the adjustable range. A vacuum switch is generally better suited than a pressure switch for Set Points very near zero gauge. Notes 1. Dead band values are expressed as typical expected at mid-range with the standard K switching element assembly installed. When optional switching elements are specifi ed, corresponding dead band multipliers shown below must be applied. 2. Special ranges may be possible. Consult the factory or the SOR representative in your area. 3. Diaphragms may have an additional effect on dead band. See page 13, Note 9. 4. Metric bar (mbar) values are practical equivalents of the reference English values; not necessarily exact mathematical conversions. This data appears on the product nameplate when metric engineering units are specifi ed. 1. Dead band values are expressed as typical expected at mid-adjustable range using the standard K switching element. When optional switching elements are specifi ed, corresponding dead band multipliers must be applied. 2. Dead bands are fi xed (non-adjustable), except when T or H switching elements are used. 3. Dead band can be adjustable by selecting T or H switching element. (Diaphragm life may be limited when used with Numbers 1 and 9 pistons.) 4. Dead band multipliers must be applied to the typical dead band value shown for piston-spring combination in specifi cations, pages 7 and 8, whenever optional switching elements other than K, KA or W are used. 5. Dead band can be widened by selecting an optional switching element with a multiplier greater than 1.0. Example: Model 6NN-G5-M4-C2A-YY Typical Dead Band 1.4 psi G-Switching Element multiplier = 3 Corrected Typical Dead Band 1.4 x 3 = 4.2 psi 6. See item #9, page 7. Dead Band Considerations 52NN-K116-M4-C2A-YY Switching Element Designators Dead Band Multiplier K, KA, N, W 1.0 D, E, J, M, Y 1.5 BD 2.5 A, B, EF, G, JF 3.0 L, YY 3.5 AF, CA, EE 4.0 C, JJ, S 5.0 EG, JG 5.5 AA, BB, GG, KK 6.0 LL 6.5 AG 8.5 T 2.5 to 6.5 H 1.0 to 3.0 Piston-Spring Adjustable Range2 (Vacuum - 0 - Pressure) Typical Dead Band1 (Vacuum Mode) Overrange Proof in. Hg (in. wc) bar [mbar] in. Hg (in. wc) mbar psi bar psi bar 52 - 116 (20 - 0 - 20) [50 - 0 - 50] (0.9) 2 200 14 400 28 52 - 117 (40 - 0 - 40) [100 - 0 - 100] (1.1) 3 54 - 117 15 - 0 - 15 0.5 - 0 - 0.5 0.5 17 750 50 1000 70 54 - 118 30 - 0 1.0 - 0 0.5 17 56 - 216 30 - 0 - 20 1.0 - 0 - 0.7 1.0 34 1500 100 2500 170 56 - 316 30 - 0