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120 Series Type H121K Models 456 to 559 Differential Pressure Switch
Brand: United Electric Controls Ltd
As safety requirements become more stringent, the determining factor in specifying an industrial pressure, differential pressure and/ or temperature switch rests upon that switch protecting equipment, processes and personnel.
Meeting hazardous location requirements through worldwide approvals and certifications, UE's 120 Series is the choice where potentially explosive or highly corrosive atmospheres exist.
The 120 Series offers a variety of pressure, vacuum, differential pressure and temperature ranges, as well as process connections, wetted materials and sensor types.
With a common flexible platform, models can quickly be adapted at the factory for special requirements, such as ranges, process connections and electrical ratings. Typical industries using 120 Series switches include chemical, petrochemical, refinery and oil & gas production and transmission.
Features- Standard product approvals include cULus, ATEX & IECEx
- Many models compliant to NACE MR-0175
- Internal adjustment hex screw or external adjustment via calibrated dial(s) with tamper resistant cover
- Integral cover lock
- Wide variety of sensor materials
- Wide adjustable deadband models
- Heat tracing temperature models
Specifications
Accuracy
- Differential Pressure Indication: Approximately 1 % Mid 50 % of Range, 3 % at Ends, Window is Plexiglass & Gasketed, Indicator may be Field Adjusted for Approximately ± 1 % Accuracy at any Set Point within Range
Adjustment Type
- Factory Set (Pre-Set)
Ambient Temperature Range
- -50° to 71° C (-58° to 160° F)
Applications
- Chemicals
- Oil & Gas Production
- Petrochemical
- Refinery
- Transmission
Approvals & Certifications
- ATEX Directive (94/9/EC) II 2 G Ex d IIC T6 Gb II 2 D Ex Tb IIIC T85° C Db IP66 Tamb: -40° to 75° C (-40° to 167° F) UL International Demko A/S (N.B.# 0539) Certificate # Demko 09-ATEX-0815573X Rev. 2 EN 60079-0, 60079-1, 60079-31 II 1 G Ex ia IIC T6 Ga
- CE
- CQST: CNEx15.2540X Ex d IIC T6 Gb Ex TD A21 T85° C IP66 Tamb. = -40° to 75° C (-40° to 167° F) GB3836.1, GB3836.2 & GB12476
- CRN
- CSA C22.2 No. 25 & 30 - File # E40857
- GOST-R 0Ex ia IIC T6 Ga x Tamb: -50° to 60° C (-58° to 140° F) NANIO CCVE Certification Center RU C-US. ГБ05.B.01185 ГOCT P MЭК 60079-11, ГOCT P MЭК 60079-0-2011, ГOCT 31610.26, IEC 60079-26
- GOST-R 1Ex d IIC T6 Gb x Tamb: -50° to 80° C (-58° to 176° F)
- GOST-U 1ExdIICT6X Tamb: -56° to 85° C (-68.8° to 185° F) СВIДОЦТВО #720 by DVSTS VE (TCCExEE)
- IECEx Certified Ex d IIC T6 Gb Ex Tb IIIC T85° C Db IP66 Tamb. = -40° to 75° C (-40° to 167° F) IEC 60079-0, 60079-1, 60079-31 Certificate # IECEx UL 03.0001X
- INMETRO Ex d IIC T6 Gb Ex Tb IIIC T85° C Db IP66 -40° C ≤ Ta ≤ 75° C UL-BR 15.0179X ABNT NBR IEC 60079-0 ABNT NBR IEC 60079-1 ABNT NBR IEC 60079-31
- INMETRO Ex ia IIC T6 Ga -50° C ≤ Ta ≤ 60° C UL-BR 15.0169X ABNT NBR IEC 60079-0 ABNT NBR IEC 60079-11 ABNT NBR IEC 60079-26
- KC
- KOSHA, Article 34 of Industrial Safety & Health Law Ex d IIC T6 -40° C < Tamb < 75° C, Certification# 10-AV4BO-0711
- Low Voltage Directive (LVD) 2006/95/EC
- PESO: CCEs Identification# P314108 / 1 EN 60079-0, 60079-1 Ex ia IIC T6 Ga, CCEs Identification# P305465 / 1 EN 60079-0, 60079-11, 60079-26
- PED: 97/23/EC
- TS ML041200701AE7, ML041200701BY3, ML041200701C40, ML041200701D31
- UL (C,US) 50 & 1203: Class I, Div. 1 & 2, Groups B, C, D, Class II, Div. 1 & 2, Groups E, F, G, Class III, Class I, Zone 1, Group IIB + H₂ T6
Approvals & Certifications
- ISO 9001
BSP Connection
- G 1/2” Male
Cap Material
- 316 Stainless Steel
Cover Material
- Gasketed Stainless Steel Tamper-Resistant Dial Cover
Deadband
- psi: 0.1 to 0.4 (kPa: 0.689 to 2.758, Mbar: 6.9 to 27.6) - Model 456 & 457
- psi: 0.2 to 1 (kPa: 1.379 to 6.895, Mbar: 13.8 to 68.9) - Model 559
Diaphragm Material
- Buna-N
- Teflon - Model 559
Electrical Connectors
- 3/4” NPT
- Terminal Block
Electrical Contacts
- Gold
- Normally Closed
- Normally Open
Electrical Rating
- 0.25 A at 250 Vdc Resistive
- 0.5 A at 125 Vdc
- 1 A at 125 Vac Resistive
- 1 A at 48 Vdc
- 10 A at 125 Vac/dc
- 10 A at 125/250 Vac Resistive
- 15 A at 125/250 Vac Resistive
- 15 A at 125/250/480 Vac Resistive
- 20 A at 125/250/480 Vac Resistive
- 3 A at 28 Vdc
- 5 A at 125/250 Vac Resistive
- 5 A at 30 Vdc
Enclosure Finish
- Epoxy Powder-Coated
Enclosure, Body Material
- Gasketed Die Cast Aluminum
Environmental Protection
- Flameproof
- Intrinsically Safe
- IP66
- Typical 4X
- Typical 7
- Typical 9
Mounting
- Pipe
- Surface
Name Plate, Tag Material
- Aluminum
- Stainless Steel
NPT Connection
- 1/2” NPT Male
- 1/4” NPT Female
- 1/4” NPT Male
O-Ring Material
- Buna-N
Operating Pressure
- psi: -14.7 to 225 (kPa: -101.4 to 1,551, bar: -1 to 15.5)
Process Connection Material
- Aluminum
Proof Pressure
- psi: 225 (kPa: 1,551, bar: 15.5)
Repeatability
- Set Point Repeatability: ± 1/2 % of Full Scale Range
Service
- Oxygen Service Cleaned in Accordance with ASTM G93, Verification Typical I, Tests 1 through 3
Set Point - Decreasing
- bar: 0.138 to 6.895
- kPa: 13.8 to 689.5
- psi: 2 to 100
Set Point - Increasing
- bar: 0.138 to 6.895
- kPa: 13.8 to 689.5
- psi: 2 to 100
Shock
- Set Point Repeats after 15 G, 10 millisecond Duration
Storage Temperature
- -54° to 71° C (-65° to 160° F)
Switch Type
- DPDT Switch, 10 A at 125/250 Vac Resistive
- SPDT
System Pressure
- bar: -1 to 15.5
- kPa: -101.4 to 1,551
- psi: -14.7 to 225
Vibration
- Set Point Repeats after 2.5 G, 5 to 500 Hz
Window Material
- Differential Pressure Indicator: Plexiglass & Gasketed
