SKP Series Technical Instructions - Power Equipment Company

SKP SeriesSKP10…U.. Electro-hydraulicActuators with Safety Shutoff FunctionFor Use With Gas Valves VG…Technical InstructionsDocument No. 155-513P25SKP10…U..Rev. 3, July, 2002DescriptionSKP10… Electro-hydraulic actuators are used in combination with VG… series gasvalves to provide safety shutoff control for industrial and commercial burnerapplications.The compact SKP10 actuator opens slowly and closes rapidly upon interruption ofpower. The two-stage models provide adjustable low and high fire control. The modulardesign allows the SKP10… to be used in combination with all VG… series gas valvesfrom 1/2-inch to 6-inch size. The actuator is easily mounted on the square flange of anyVG… valve with the four bolts contained in the terminal box of the actuator (underthe green cover). No gaskets or seals are required when mounting the actuator. Thevalve position is shown by a visible position indicator displaying the entire stroke rangeof the actuator.Features • UL listed, FM approved, CSA certified for the United States and Canada, IRIapprovable, ISO 9001 certified; European, Australian and Japanese approvedversions available.• Proof of Closure-Over Travel (POC-OT) versions available.• Visual stroke indication.• Optional auxiliary switches available.• Modular construction allows 360 o rotation of actuator for easy field wiring andinstallation.• Low, 23 VA power consumption.ApplicationSKP10… series actuators may be combined with 1/2-inch to 6-inch VG… series gasvalve bodies. VG… series gas valves are ordered separately (See VG…U.. TechnicalInstructions No. 155-512P25).Siemens Building Technologies, Inc.

Technical InstructionsDocument No. 155-513P25Rev. 3, July, 2002SKP10…U.. Electro-hydraulic ActuatorsProduct Numbers Table 1.Product NumberOperatingModeOperatingVoltageProof of Closure-OverTravel& Auxiliary SwitchType ofSwitchSKP10.110U17 On-Off 110 – 120 Vac No —SKP10.111U17 On-Off 110 – 120 Vac Auxiliary SPDTSKP10.191U17 On-Off 110 – 120 Vac Proof of Closure-Over Travel SPDTSKP10.192U17 On-Off 110 – 120 Vac Proof of Closure-Over Travel& AuxiliarySPSTSPSTSKP10.110U27 On-Off 220 – 240 Vac No —SKP10.111U27 On-Off 220 – 240 Vac Auxiliary SPDTSKP10.192U27 On-Off 220 – 240 Vac Proof of Closure-Over Travel& AuxiliarySPSTSPSTSKP10.123U17 Two-stage 110 – 120 Vac Auxiliary SPDTSKP10.923U17 Two-stage 110 – 120 Vac Proof of Closure-Over Travel SPDTSpecificationsAgency approvalsAs safety shut-off valveUL/429, FM/7400, ANSI Z21.21/GCA6.5C/Iin combination with VG…U.. series gasvalvesPower supply Operating voltage 110 to 120 Vac + 10%-15%220 to 240 Vac + 10%-15%Operating frequency 50 to 60 Hz + 6%Power consumption23 VADuty cycle 100%Operating environment Ambient operating temperature 15°F to 140 o F (-10°C to 60 o C)Mounting positionOptional, but not upside downPhysical characteristics Weight 2.75 lb (1.25 kg)Enclosure NEMA 1, 2, 5 and 12Dimensions See Figure 2Specification for valvesSee VG Series Gas Valves TechnicalInstructionsNo. 155-512P25Connections Conduit connection 1/2-inch NPSM adapterOperatingOutput force 100 lb (450 N)characteristicsMaximum stroke0.7-inch (18 mm)Opening timeVaries with valve size, 12 seconds formaximum strokeClosing time

SKP10…U Electro-hydraulic ActuatorsTechnical InstructionsDocument No. 155-513P25Rev. 3, July, 2002OperationFigure 1. SKP10…U.. Operation.The electro-hydraulic actuator consists of a cylinder filled with oil and a pistoncontaining an electric oscillating pump. When power is supplied to the actuator, thepump moves oil from the reservoir into the pressure chamber. This action causes thepiston to move downward in the cylinder, opening the gas valve. When power to thepump is interrupted, the valve closes in less than 0.8 seconds.InstallationA visible disk fitted to the pump shaft indicates the entire stroke range of the actuator.This disk also operates optional auxiliary switches via a set of levers. The switchingposition of the auxiliary switch is adjustable over the entire stroke. The proof of closureswitch is non-adjustable.WARNING:All installations must be carried out by qualified personnel only.The SKP10… actuator is directly coupled to the VG… series valve body by four bolts,contained in the terminal box of the actuator (under the green cover). The squaremounting flange can be rotated in steps of 90 o to provide four different mountingpositions. The actuator should be mounted so that the stroke position indicator isvisible.The SKP10… actuator can be mounted in any position except upside down. Theactuator can be mounted or replaced while the gas valve is under pressure. Theactuator packing contains an electrical conduit adapter to match the 1/2-inch NPSMconduit. If the actuator is equipped with an auxiliary or proof of closure switch, twoadapters are included.NOTE:Wiring must conform to local electrical codes.Wiring and SwitchAdjustmentAdjust the auxiliary switch (if provided) according to the wiring diagram located on thelabel affixed to the actuator's side. (Also see Terminal Designations.)Auxiliary and Proof ofClosure SwitchNOTES:1. The auxiliary switch must not be used for proof of closure detection orother interlock functions.2. The Proof of Closure Switch is non-adjustable.Siemens Building TechnologiesPage

Technical InstructionsDocument No. 155-513P25Rev. 3, July, 2002SKP10…U.. Electro-hydraulic ActuatorsTwo-stage controlSee the wiring diagram located on the label affixed to the actuator’s side.Connect the low fire power supply to Terminal 1, neutral to Terminal 2 and high firepower supply to Terminal 3.Adjust the low fire and high fire positions according to the wiring diagram located on thelabel affixed to the actuator’s side. (Also see Terminal Designations.)ServiceThere are no serviceable parts on the SKP10… Series actuators. If inoperative, replacethe actuator. Tag wires before replacing.TerminalDesignationsLNLNAUXLNPOCLNAUXPOCV1NV2AUXV1NV2POC12123 45 6123 45 612345 612345 612345 6IVIVIIIIV%100V2V10IV%100V2V10GAS0016R1GAS0017R20...100%IV- +IVGAS0024R2IVGAS0025R2-0...100%IIIIV+GAS0041R1-0...100%I+-0...100%III-0...100%IV+ +GAS0042R1-0...100%I+-0...100%III+IVDimensions(Dimensions in inches;millimeters inparentheses)SKP10.110U SKP10.111U.. SKP10.191U.. SKP10.192U.. SKP10.123U SKP10.923UFigure 2. SKP10…U.. Dimensions.Information in this publication is based on current specifications. The company reserves the right to make changes in specifications and models asdesign improvements are introduced. Other product or company names mentioned herein may be the trademarks of their respective owners.© 2002 Siemens Building Technologies, Inc.U.S.A.Your feedback is important to us. If you havecomments about this document, please sendthem to technical.editor@peconet.comDocument No. 155-513P25Printed in the U.S.A.Page 4

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