User Manual

ManualsBrandsSiemens ManualsBurner EquipmentActuators for Gas Valves SKPx5, SKL25

CC1N7743en

20.11.2019

Smart Infrastructure

643

Open / Closed

with constant pressure

governor

Open / Closed

with differential pressure

governor

Open / Closed

with ratio pressure governor

SKP15 SKP25 SKP55 SKP75

Actuators for gas valves

SKPx5...

 Open / closed safety shutoff function conforming to EN 161 in combination

with valves supplied by Siemens

 Damped opening (rapid closing)

 Very low power consumption

 Suitable for use with gases of gas families I...III

 Optionally with / without end switch (factory-set)

 Plug-in connection facility

 Electrical indication of operation

 Valve stroke indication

 Supplementary Data Sheets on valves (refer to «Use»)

 Models for USA on request

The SKPx5 and this Data Sheet are intended for use by OEMs which integrate the

actuators in their products.

Summary of content (46 pages)

PAGE 1
7 Open / Closed Open / Closed with constant pressure governor SKP15 SKP25 Open / Closed with differential pressure governor SKP55 Actuators for gas valves           643 Open / Closed with ratio pressure governor SKP75 SKPx5... Open / closed safety shutoff function conforming to EN 161 in combination with valves supplied by Siemens Damped opening (rapid closing) Very low power consumption Suitable for use with gases of gas families I...
PAGE 2
Use Modular concept Actuators SKPx5 in general Actuators are designed for use with the following types of valves: Type of valve Medium Data Sheet VGG VGF Natural gas Gases of gas families I...III N7636 VGJ Gases of gas families I...III N7650 VGD2 VGD4 Natural gas Gases of gas families I...
PAGE 3
Use (cont´d) SKP25.0 with AGA30.7 and SAS The SKP25.0 with AGA30.7 and SAS solution enables motorized pressure setpoint adjustment  for motorized setting or correction of the setpoint  for atmospheric and comparable burner operating conditions, typical output modulation multistage or shifting < 1 : 5  not for gas-air ratio combined systems (e.g. class C in accordance with EN 12067-2)  SKP25.0 (with AGA30.
PAGE 4
Engineering notes The SKPx5.xx1xx are supplied with the end switch factory-set. Design of the gas train If the available gas pressure exceeds the maximum permissible operating pressure of the valve (VGx / VRx) / actuator (refer to the Data Sheet of the relevant valve), it must be lowered by an upstream pressure controller. The pressure switch for lack of gas must always be fitted upstream of the valve when used in combination with the actuator.
PAGE 5
Engineering notes (continued) SKP75  Installation of impulse pipes: In the case of unsafe combustion chamber pressure pipes (e.g. resulting from potential leaks). The setting must also be checked during operation without having the combustion chamber pipe connected, especially with respect to maximum burner capacity. The impulse pipes must be fitted such that the differential pressure can be acquired with no disturbance.
PAGE 6
Mounting notes     Ensure that the relevant national safety regulations are complied with The quadratic arrangement of the fixing holes allows the actuator to be fitted in 4 different positions on the VGx valve, each step being 90° (depending on the type of VGx valve) The actuator can be mounted or replaced while the system is under pressure; sealing material is not required SKP25 / SKP55 / SKP75: SKPx5 with pressure control function have a vent opening on the pressure governor.
PAGE 7
Installation and commissioning notes Functioning principle of 1-stage actuator SKP15 with safety shutoff feature When power is applied, the pump will be activated and the control valve closed. Oil is now pumped from the chamber below the piston to the stroke chamber above the piston. The oil pressure causes the piston to move downward, thereby opening the valve – against the pressure of the closing spring. The pump remains energized until the closing command is given.
PAGE 8
Installation and commissioning notes (cont´d) SKP25, SKP55 and SKP75 The functioning principle (safety shutoff feature) is identical to that of the SKP15, but with the help of their pneumatic governor, the SKP25, SKP55 and SKP75 also control a bypass valve in the hydraulic circuit and thus the valve‘s opening position.
PAGE 9
Installation and commissioning notes (cont´d) The SKP25.3 operates based on the proportionate pressure principle «PL» : «PG» = 1:1. By feeding fan pressure «PL» to the air connection, gas pressure «PGas» follows in a fixed 1-to-1 ratio. SKP25.3 C A Gas / air ratio for stoichiometric combustion B / C The governor permits one parallel displacement in both directions: «gas pressure lowering» B and «gas pressure elevation» C + 0.1 kPa  SKP25.
PAGE 10
Installation and commissioning notes (continued) SKP25 with AGA30.7 and SAS The SKP25.0 (with AGA30.7 and SAS) operates like the SKP25 constant pressure governor, but features electromotoric adjustment of the setpoint spring. It is used primarily in  atmospheric or comparable burners in modulating or multistage operation  individual burners or groups of burners on industrial furnaces (gas pressure correction and disturbance variable compensation)  not approved for gas-air ratio combined solutions (e.g.
PAGE 11
Installation and commissioning notes (continued) Setting example: The low-fire pressure value (offset) is adjusted by screwing in the AGA30.7 on SKP25.0. The maximum high-fire limitation (maximum pressure (PGmax)) is set with the stem of the SAS extended via the lock nut on AGA30.7. The desired pressure ranges (up to 32 kPa) are determined by use of the setpoint springs (AGA22, AGA23, 7421500490).  Note! See Mounting Instructions A5W00000658 (M7643).
PAGE 12
Installation and commissioning notes (cont’d) SKP25.2 The SKP25.2 features 2-stage setpoint changeover for 2-stage gas burners. Assembly of SKP25.2 complete with valve (Schematic drawing) Activation stage 2 Connection Pc Throttle AGA25.2 12 10 Legend PGas 1 2 3 4 5 6 7 8 9 10 11 12 4 11 1 9 DC magnet stage 2 SKP25.2....
PAGE 13
Installation and commissioning notes (cont’d) Setpoint adjustment «PGas» is made manually by turning the setting screws (10 and 11), which act on the setpoint spring. PGas High-fire (stage 2) SKP25.2: max. 6 kPa SKP25.2...L: max. 2 kPa Low-fire (stage 1) >0.2 kPa Setting example: 1. 2. 3.  Set the low-fire load (stage 1): Set the low-fire screw (11) to the required pressure value ( +PGas).
PAGE 14
Installation and commissioning notes (cont´d) SKP25.4 is designed to manage higher pressures of up to 200 kPa. SKP25.4 ¹) Approved as a:  Safety shutoff valve in accordance with EN 161  Pressurestat in accordance with EN 88-2:AC5; EN 88-2:SG10 or ISO 23551-2  ¹) Note! SKP25.4 is not approved as an overpressure safety shutoff valve (SAV). (Schematic drawing) SKP25.4 complete with valve 11 Legend 4 12 PGas 2 7 3 9 SKP25.4....
PAGE 15
Installation and commissioning notes (cont´d) Setpoint adjustment «PGas» is made manually by turning the setting screw, which acts on the setpoint spring (for setpoint springs, also refer to «Accessories»). PGas Legend Pe Inlet pressure PGas 7...200 kPa depending on the V 7643d03/0107 t (Pe; V) Volumetric flow setpoint spring, see Accessories (with built-in standard spring AGA23), presetting 120 kPa Pressure range (kPa) Setpoint spring 7...70 15...150 20...
PAGE 16
Installation and commissioning notes (cont´d) SKP55 The SKP55 operates with a differential pressure governor and a fixed differential pressure ratio of 1-to-1. SKP55 complete with valve (Schematic drawing) Air Legend PGas 4 1 9 2 7 10 1 2 3 4 5 6 7 8 9 10 Piston Oscillating pump Oil reservoir Pressure side Stem Valve’s closing spring Control valve End switch (optional) Spring (setpoint adjustment) Bypass valve 3 SKP55...
PAGE 17
Installation and commissioning notes (cont´d) M pL 8 Air 11 VL 3 - SKP55.../V... A +2 1 + B B - 4 5+ Gas 7643z01e/1204 7 10 VG pG 9 Safety notes: Arrangement air damper  / orifice 11 must always be located as shown, which means that orifice 11 must be installed downstream from the air damper .
PAGE 18
Installation and commissioning notes (cont´d) SKP55 Adjustment of governor on modulating burners prior to startup:  Setting screw  on the SKP55 should be set to a gas / air ratio curve which passes through the neutral point. The SKP55 is supplied with that factory setting. Adjustment in the field can be made as follows: Note: Fit cap again before measuring the combustion value and after the setting is made. Turn setting screw  in counterclockwise direction until spring  is completely loose.
PAGE 19
Installation and commissioning notes (cont´d) SKP75 The SKP75 operates with a ratio pressure governor and an adjustable gas / air ratio. SKP75 complete with valve (Schematic drawing) Legend SKP75... Air PGas 4 1 9 2 1 2 3 4 5 6 7 8 9 Piston Oscillating pump Oil reservoir Pressure side Stem Valves closing spring Control valve End switch (optional) Bypass valve 7 3 8 5 > 6 mm Valve pE 7643z33e/0407 Adjustment of governor on modulating burners      min.
PAGE 20
Installation and commissioning notes (cont´d) If a significant parallel displacement of the working characteristic was required to obtain optimum CO2 or O2 values in low-fire operation, the adjustment of the pressure ratio at high-fire or 90 % of the high-fire must be checked again and readjusted, if required.
PAGE 21
Installation and commissioning notes (cont´d) Function If the air pressure (fan pressure) exceeds the maximum value of   3 kPa with a PGas / PAir ratio of 2 5 kPa with a PGas / PAir ratio of 2 permitted for the controller, the pressure must be lowered with a pressure-reducing Tpiece (AGA78) (also refer to Technical data). Example: p1 = 7 kPa D1 = 1.5 mm D2 = 1.7 mm Wanted: Air pressure signal «p2» for SKP75 p2 = 2.
PAGE 22
Standards and certificates Applied directives:  Low-voltage directive  Directive for pressure devices  Gas Appliances Regulation (EU)  Electromagnetic compatibility EMC (immunity) *) In combination with VGx 2006/95/EC 2014/68/EU (EU) 2016/426 2014/30/EU *) Compliance with EMC emissions requirements must be checked after the actuator has been installed in the work equipment Compliance with the regulations of the applied directives is verified by the adherence to the following standards / regulations:
PAGE 23
Life cycle The combination valve and actuator have a designed lifetime* of Nominal size Burner startup cycles 25 DN 200.000 25...80 DN 100.000 80...150 DN 50.000 which, under use of gases to EN 437 (or DVGW specification G260). This lifetime is based on the endurance tests in the standard EN 161. A summary of the conditions has been published by the European Control Manufacturers Association (Afecor) (www.afecor.org).
PAGE 24
Type summary (other types of actuators on request) The complete gas shutoff assembly or pressure governor assembly consists of actuator and valve. SKP25 Article no. Mains voltage 1-stage opening and closing, with end Type Article no. AC 120 V Type AC 230 V BPZ:SKP25.001E1 ²) SKP25.001E1 ²) BPZ:SKP25.001E2 ²) SKP25.001E2 ²) BPZ:SKP25.003E1 ²) SKP25.003E1 ²) BPZ:SKP25.003E2 ²) SKP25.003E2 ²) --- --- BPZ:SKP25.003E2Y SKP25.003E2Y BPZ:SKP25.201E1 SKP25.201E1 BPZ:SKP25.201E2 SKP25.
PAGE 25
Type summary (other types of actuators on request) SKP55 Article no. Mains voltage 1-stage opening and closing, with end Type Article no. AC 120 V Type AC 230 V BPZ:SKP55.001E1 SKP55.001E1 BPZ:SKP55.001E2 SKP55.001E2 BPZ:SKP55.003E1 SKP55.003E1 BPZ:SKP55.003E2 SKP55.003E2 switch, with differential pressure governor 1-stage opening and closing, without end switch, with differential pressure governor SKP75 Article no.
PAGE 26
Ordering examples When ordering, please give the complete type reference of the actuator (refer to «Type summary»). All components must be ordered as separate items. Example of SKP15 Actuator with safety shutoff function - Open / closed - With end switch - For AC 230 V / 50 Hz Connector valve actuator (plug) Connector end switch (plug) SKP15.001E2 AGA64 AGA65 Combination of actuator / valve consisting of: Valve SKP15.
PAGE 27
Accessories (not supplied as standard, to be ordered as separate items) Adapter plug AGA62.000A000 Article no.: BPZ:AGA62.000A000 For powering both actuators on the double valve VGD via plug (AGA64) Example: SKP15 / SKP25.2 with adapter plug AGA62.000A000 7643z49e/0407 Central connection via AGA64 for the separate control of valves 1 and valves 2 Facilitates valve prooving via pressure switch between the valves or ignition via pilot burner V1 Heating element   V2 AGA63.5A27 Article no.: BPZ:AGA63.
PAGE 28
Accessories (not supplied as standard, to be ordered as separate items) (cont´d) Contact box for valve actuator (power supply)    AGA64 Article no.: BPZ:AGA64 Plug-in connector conforming to DIN EN 175301-803-A 3 pole + Dia. 6...9 mm / max. 1.5 mm² Example: SKP15 / SKP25 with contact box AGA64 Contact box for end switch    AGA65 Article no.: BPZ:AGA65 Plug-in connector conforming to DIN EN 175301-803-A 3 pole + Dia. 4.5...11 mm / max. 1.
PAGE 29
Accessories (not supplied as standard, to be ordered as separate items) (cont´d) Contact box AGA67 Article no.: BPZ:AGA67   For powering the magnetic actuator SKP25.2 Plug-in connector conforming to DIN EN 175301-803-A     With integrated bridge rectifier 2 pole + Dia. 6...8 mm / max. 1.5 mm² Including profile seal Example: SKP15 / SKP25 with contact box AGA67 7643z47e/0407 Contact box AGA67 V1 V2 Adapter plug for AGA62.000A000 AGA68 Article no.
PAGE 30
Accessories (not supplied as standard, to be ordered as separate items) (cont´d) Article no. Motorized setpoint adjuster for SKP25.0  For 5.5 mm stroke  See Data Sheet N4581 and Mounting Instructions A5W00000658 (M7643) Type SAS... Adaptation to SKP25 For motor pressure correction in conjunction with motorized setpoint adjuster SAS. For more details, refer to Mounting Instructions A5W00000658. S55851-Z401-A100 AGA30.7 Damping throttle for SKP25 Optional BPZ:AGA25.2 AGA25.
PAGE 31
Accessories (not supplied as standard, to be ordered as separate items) (cont´d) Pressure range 0.5...3.5 kPa 2.5…5.5 kPa Color Black 1.5...12 kPa Diameter in mm SKP25.0 Actuator SKP25.3 SKP25.4 Accessories 1 ● --- --- Required AGA30.7 1.5 ● --- --- Required Optional AGA30.0 Yellow/Gold Mounting instructions A5W00000658 Article no. Type S55851-Z301-A100 AGA21 BPZ:AGA22 AGA22 BPZ:AGA23 AGA23 7…70 kPa 1.5 --- --- ● Required Optional AGA30.0 10...25 kPa 1.
PAGE 32
7643z45e/0407 Accessories (not supplied as standard, to be ordered as separate items) (cont´d) Distance piece Seal Gasket set     AGA66 Article no.: BPZ:AGA66 For mounting between actuator and valve (VGx / VRx) Increases degree of protection from IP54 to IP65 When using VGG single valves, observe Data Sheet N7636 Refer to Mounting Instructions M7643.
PAGE 33
Technical Data  General unit data Note! All typical technical information applies to nominal conditions. Mains voltage - Europe  SKPx5.xxxE2  SKPx5.xxxE1 - Japan  SKPx5.xxxF1  SKPx5.xxxF2 Mains frequency - Europe - Japan Power consumption European  SKPx5.xxxEx  SKP25.2xxEx Japan  SKPx5.xxxFx Closing time  SKPx5 Required time interval load change carried via air / fuel ration pressure between highfire and low-fire  SKP25.
PAGE 34
Technical Data (cont´d) Control variable gas pressure  SKP25.0  SKP25.2  SKP25.2xxxxL  SKP25.3  SKP25.4  SKP25.6  SKP55  SKP75 / SKP75.5 Absolute / difference pressure of combustion air (reference variable)  SKP25.3  SKP55  SKP75 / SKP75.5 Air pressure / difference pressure - at «PGas / PAir»  2 - at «PGas / PAir»  2 - Upper pressures refer to AGA78 «Accessories» Difference pressure ratio (gas / air) adjustable  SKP25.3 / SKP55  SKP75 / SKP75.
PAGE 35
Technical Data (cont´d) Technical Data (cont´d) Permissible mounting positions 7643z07/0603 Always with the diaphragms in the vertical position Weight  SKP15  SKP25  SKP25.0  SKP25.2  SKP55  SKP75  AGA64  AGA65  AGA62.000A000 Permissible media Media inlet pressure «PE» Permissible media temperature Flow rate Permissible test pressure «PG» Permissible under pressure «PG» Gas family Approx. 1.1 kg Approx. 1.6 kg Approx. 1.6 kg Approx. 2.1 kg Approx. 1.9 kg Approx. 2.3 kg Approx. 30 g Approx.
PAGE 36
Technical Data (cont´d) Environmental conditions Storage Climatic conditions Mechanical conditions Temperature range Humidity Transport Climatic conditions Mechanical conditions Temperature range Humidity Operation Climatic conditions Mechanical conditions  SKP25.0 with AGA30.7 and SAS Temperature range Temperature range Mechanical conditions  SKP25.2  SKP25.0 with AGA30.7 and SAS Humidity Installation altitude DIN EN 60721-3-1 Class 1K3 Class 1M2 -15...+60 °C <95 % r.h.
PAGE 37
Contact assignment device connector N L 7643z43/0706 Connection of actuator (front-view) 2 1 3 2 3  If valve closed 1 Valve actuator Connection via AGA64 DIN EN 175301-803-A End switch Connection via AGA65 DIN EN 175301-803-A (Only with SKPxx.xx1xx) 6/46 Smart Infrastructure CC1N7643en 20.11.
PAGE 38
Dimensions Dimensions in mm 7643m18e/0407 188 Example: SKP15.000 Actuators SKP15 9 83 Hexagon socket width across flats 4 mm 15.8 M5 74 87 18.3 74 86 64 SKP15.000 (no valve stroke indication) SKP15.001 30.5 30.5 6.3 Detail X Tightening torque central screw 0.4 Nm Detail X Connector valve-actuator to DIN EN 175301-803 design A, 2 pole + Connector end switch to DIN EN 175301-803 design A, 3 pole + 9 9 Connector valve-actuator to DIN EN 175301-803 design A, 2 pole + 6.
PAGE 39
Dimensions (cont´d) Dimensions in mm Actuator SKP25.0 / SKP25.3 / SKP25.6 96.2 32.5 Rp1/4 Rp1/4 200 221 X 168 202 188 Pressure test point 9 83 Hexagon socket width across flats 6 mm 7643m19e/0407 M5 15.8 18.3 86 64 74 87 106 74 98 141 SKP25.001 30.5 6.3 Connector valve-actuator to DIN EN 175301-803 design A, 2 pole + Detail X 4.8 9 9 Only SKP25.001... / SKL25.001... connector end switch to DIN EN 175301-803 design A, 3 pole + Tightening torque central screw 0.
PAGE 40
Dimensions (continued) Dimensions in mm 7643m37/1215 ~95...107 Actuator SKP25.0 with AGA30.7 and SAS) ~138 48...58 96 ~282...292 9/46 Smart Infrastructure CC1N7643en 20.11.
PAGE 41
Dimensions (continued) Dimensions in mm SAS motorized setpoint adjuster C1 C2 7643m38/1215 E A B D Type Without ASK39.2 A B 1) 137.6 151 2) 80 C C1 106.5 21.9 C2 D E ► ►► Kg 84.6 29.9 21.8 100 200 0.68 10/46 Smart Infrastructure CC1N7643en 20.11.
PAGE 42
Dimensions (cont´d) Dimensions in mm Actuator SKP25.2 71.5 32.5 Damping throttle AGA25.2 Rp1/4 45.7 Rp1/4 168 X 9 83 Hexagon socket width across flats 4 mm 207 221 188 202 Pressure test point 7643m21e/0407 M5 15.8 18.3 64 86 157.8 (with locking cap) 200.8 (with locking cap) 26.5...30.7 94.7...118.3 74 87 106 74 151,5 (without locking cap) 194,5 (without locking cap) SKP25.201 30.5 6.3 Connector to DIN EN 175301-803 design A, 2 pole + 4.
PAGE 43
Dimensions (cont´d) Dimensions in mm 71.7 Actuators SKP25.4 32.5 Rp1/4 Rp1/4 9 221 83 Hexagon socket width across flats 4 mm 207 168 188 202 Pressure test point 7643m23e/0407 M5 15.8 86 18.3 74 87 106 74 64 105.1 148 SKP25.401 30.5 Connector valve-actuator to DIN EN 175301-803 design A, 2 pole + Only SKP25.401... connector end switch to DIN EN 175301-803 design A, 3 pole + 4.8 9 9 Detail X 7643m24e/0407 M3 18 Tightening torque central screw 0.
PAGE 44
Dimensions (cont´d) Dimensions in mm 92.7 Actuators SKP55 50 Rp1/4 Rp1/4 58.2 32.5 +Air ATMOSPHERE 207 233 188 202 Pressure test point 83 168 X 9 Hexagon socket width across flats 4 mm 7643m27e/0407 M5 15.9 86 18.3 64 74 87 106 Rp1/4 74 126 169 SKP55.001 30.5 6.3 Connector valve-actuator to DIN EN 175301-803 design A, 2 pole + Detail X 4.8 9 9 Only SKP55.001... connector end switch to DIN EN 175301-803 design A, 3 pole + Tightening torque central screw 0.
PAGE 45
Dimensions (cont´d) Dimensions in mm 58.4 Actuators SKP75 83 188 202 X 188 269 Pressure test point 242 Rp1/4 Rp1/4 Rp1/4 32.5 9 Hexagon socket width across flats 4 mm 7643m29e/0407 M5 15.8 86 18.3 74 87 146 64 74 126 169 SKP75.001 30.5 6.3 Connector valve-actuator to DIN EN 175301-803 design A, 2 pole + Detail X 9 4.8 9 Only SKP75.001... connector end switch to DIN EN 175301-803 design A, 3 pole + 7643m30e/0407 Tightening torque central screw 0.
PAGE 46
Dimensions (cont´d) Dimensions in mm Adapter plug AGA62.000A000 - For 2 actuators mounted on one double valve N L2 PE PE 1 2 1 2 L1 N 32 7643m01e/0407 25 270 10 Tightening torque central screw 0.4 Nm L1 M3 Connection diagram L1 L2 N PE L2 PE L1 N PE L2 N PE N SW4 SW32 7643m36en/0415 Ø26 AGA30.x SW = Width across flats 38 52 59,1  2019 Siemens AG Smart Infrastructure, Berliner Ring 23, D-76437 Rastatt Subject to change! 15/46 Smart Infrastructure CC1N7643en 20.11.