Modulating control valve PN16 with magnetic actuator

Transcription

1 Modulating control valve PN with magnetic actuator for hot and chilled water with positioning control and position feedback MP...GY MP...FY MP...GY MP...FY Mixing or straight-through valves with magnetic actuators for modulating control of hot and chilled water systems. Fast positioning time (< s) High resolution (> : 000) High rangeability > closed when de-energised With positioning control and position feedback Low friction, robust and maintenance-free se The MP...GY and MP...FY valves are mixing or through port valves with a readymounted magnetic actuator. The actuator is equipped with connecting electronics for positioning control and position feedback. If the power is off, the valve control path > is closed. Warning : The valve is suitable for straight-through or three-way applications and may be installed ONLY in a mixing arrangement. The short positioning time, high resolution and high rangeability make these valves ideal for proportional control of hot and chilled water systems. The low-friction, robust and maintenance-free construction make regular service unnecesary. Type summary The MP...Y valves are available in a screwed and a flanged version: MP...GY MP...FY Screwed valves with DN8... DN0 Flanged valves with DN8... DN00 For operating data and type overview see table on page Landis & Staefa CANE May 998 /8

2 Operating data q [mm ] Valve type DN kvs p vmax PN Pmed,,,0 screwed flanged [mm] [m /h] [kpa] [bar] [VA] [VA] L [m] MP08GY MP08FY 08/ 0, MP0GY MP0FY 0/, MPGY MPFY, MP0GY MP0FY 0, MPGY MPFY 8, MPGY MPFY MP0GY MP0FY MP0GY MP0FY MPFY MP80FY MP00FY Legend: p v max = Max. admissible pressure differential PN = Nominal power Pmed = Mean operating power kvs = Flow rate to VDI/VDE7, tolerance ±0 % q = Cross section of DC 0 V or AC V cable (Cu) L = Max. cable length. With -wire connections, the maximum permissible length of the separate. mm Cu signal cable is 00 m. Ordering The valves are supplied complete with the magnetic actuator and the terminal housing. The blank flanges or screwed taps required for straight-through applications must be ordered separately (see 'Accessories' on page ). When placing an order, please specify the quantity, product description and type code. Example: flanged valve MP0FY and blank flange Z/0 Technical / Mechanical design See data sheet N08 for a detailed description of operation. The control signal is converted in the terminal housing into a phase cut signal which generates a magnetic field in the coil. This causes the only moving part, the armature, to change its position in accordance with the interacting forces (magnetic field, counterspring, hydraulics etc.). The armature responds rapidly to any change in signal, transferring the corresponding movement directly to the control disc, enabling fast changes in load to be corrected quickly and accurately. The valve position is measured continuously. Any disturbance in the system is rapidly corrected by the internal positioning controller, which ensures that the control signal and the valve stroke are exactly proportional, and also provides a feedback signal indicating the valve position. Stroke [%] Control signal [V] If the power is switched off or fails, the valve control path (port > ) is automatically closed by the force of the spring. The valve stem is sealed with a maintenance-free O-ring gland. /8 CANE May 998 Landis & Staefa

3 Manual adjustment Accessories Control path ports > can be opened mechanically to between 0 and approximately 90 %, by turning the handwheel clockwise. The manual adjustment facility can also be used as a mechanical method of low limit control, i.e. the valve will exercise its normal control function between the manually-set position and the 00% open position. For fullstroke automatic control, the handwheel must be set to 0 (the anticlockwise end-stop). For flanged valves: Close off port '' in straight-through applications. The blank flange kit consists of a seal, screws, spring washers and nuts. Z/... Z/ Screwed tap for flanged valves with DN... DN or Z/F... Z/F Blank flange kit for flanged valves with DN... DN Z/0... Z/00 Blank flange kit for flanged valves with DN0... DN00 See sheet N000 for a summary of valves for water and steam Sizing Water flow chart Flow / pressure differential relationship. kvs signifies the volume of water V in m /h which flows through the open valve at a pressure differential pv of 00 kpa ( bar). See data sheet N0 for notes on calculating the value of kvs.. [m /h] V p v max ,7 MP...Y DN00 k vs 0 DN80 k vs 80 DN k vs 0 DN0 k vs 0 DN0 k vs 0 DN k vs DN k vs 8 DN0 k vs DN k vs DN0 k vs, 900A [l / s] ,7 0, 0, 0, 0, 0, 0, DN DN08 kk vs 0, 0, 0,07 0,0 0,07 0,0 0, [kpa] 0,0 0,0 0,0 0,0 0,07 0, 0, 0, 0, [bar] pv Mounting notes Two mounting instructions are enclosed with the valve: Ref. 8 (valve) and Ref. 77 (ZM... terminal housing). Caution : Always disconnect the power before fitting or removing the terminal housing. The terminal housing is calibrated and matched to the actuator, and should be replaced only by qualified personnel. The MP...Y valve is suitable for straight-through or three-way applications but may be installed ONLY in a mixing arrangement. Vertical to horizontal mounting: Protection standard IP. The valve must not be suspended below the horizontal. The MP...GY screwed valves are flat-faced to facilitate sealing with the gaskets supplied. The use of sealing compounds, tape or hemp thread is not recommended. The actuator must not be lagged. Only three-way valves are supplied, but these may be used in straight-through applications by sealing port as described on page. Landis & Staefa CANE May 998 /8

4 Recommendation Straight-through applications Water systems should be cleaned, flushed and treated in accordance with current good practice, as described, for example, in BSRIA Application Guides AG 8/9 and AG/9. For other relevant information, see also CIBSE Guide B (Section 7). Flanged valves in straight-through applications Close off port '' with the type Z/... accessories, which must be ordered separately. The blank flange kit consists of a seal, screws, spring washers and nuts. for DN... DN Screwed tap (Z/... Z/) or blank flange (Z/F... Z/F) for DN0... DN00 Blank flange kit (Z/0... Z/00) 0789A Z/ Z/0 Z/ Z/ Z/F Z/0F Z/F Z/F Z/0 Z/0 Z/ Z/80 Z/00 Screwed valves in straight-through applications Close off port '' with the accessories supplied (nut, cover and gasket). 9N0 B Technical data Electrical interface Only admissible with low voltage (SELV, PELV) Control signal DC V or DC... 0 ma Supply voltage AC V, 0/0 Hz Max. voltage tolerance +/ 0 % Nominal power See 'Operating data', page Position feedback (output signal): DC V = % stroke Max. load. ma Accuracy ± % of full scale Nominal pressure PN Operating pressure p e max MPa (0 bar) Pressure differential p v max See 'Operating data' on page Leakage at p v = 0. MPa (bar) > Max. 0.0 % kvs (to VDI/ VDE7) > Depends on application data (approx. % kvs) Water temperature...0 C Valve characteristic (stroke, kv) Linear, optimised in low-opening range Resolution H / H00 > : 000 (H = stroke) Type of operation Modulating Manual adjustment 0 % to max. 90 % depending on DN Position when de-energised > closed Orientation pright to horizontal Positioning time < s Materials (valve body): Housing Cast iron Inner valve CrNi steel Seat Brass Valve spindle seal EPDM (O-ring) Connection terminals Screw terminals for mm wire Protection standard pright to horizontal mounting IP to IEC9 Ambient temperature... 0 C Weight (incl. packaging) See 'Dimensions' on page 7 Conformity Meets the requirements for CE marking /8 CANE May 998 Landis & Staefa

5 Internal diagram Block diagram of the signal converter NS = system ground LS ~ G + AC V NS T M 0 Input DC V Input DC... 0 ma R T + V V E Q Position transducer Output DC V Position feedback electronics with base/span adjustment Key to block diagram E Phase cut converter G Bridge rectifier M Magnetic valve Q Phase cut output R T V Input resistor 0 k ohms Voltage / current converter (load on 0 ohms to NS) Position/ voltage converter Differential amplifier Connection terminals 0B ~ TE AC V supply Common Input DC V Output DC V Input DC... 0 ma Warning : If the controller and the valves receive their power supply from separate sources, the valve transformer must not be earthed on the secondary side. Connection diagrams with DESIGO 0 with INTEGRAL RS refer to manual R refer to manual K with MLTIREG Warning : The transformer T must not be earthed on the secondary side and should be suitably fused. T T AC V AC V RPR MP...Y 0en AC V GND Output DC V Input DC V 9 ) Valve position indication DC V = % ) ~ AC V Supply Common Input DC 0..0 V Output DC 0..0 V T E with other controllers (output DC V) T AC V MP...Y 0en Output DC V Valve position indication DC V = % ) ~ T E AC V Supply Common Input DC V Output DC V ) only where required Landis & Staefa CANE May 998 /8

6 with other controllers (output DC... 0 ma) T AC V MP...Y 099en Output DC... 0 ma Valve position indication DC V = % ) ~ AC V Supply Common Output DC V Input DC... 0 ma T E ) only where required Application examples The hydraulic circuits shown here are schematic diagrams only, without installationspecific details. Warning : The valve is suitable for straight-through or three-way applications and may be installed ONLY in a mixing arrangement. Hydraulic circuits 080 B 0 x DN [min. 0, m] A B C D E Legend A Mixing circuit B Mixing circuit with bypass (underfloor heating) C Injection circuit D Diverting circuit E Injection circuit with straight-through valve /8 CANE May 998 Landis & Staefa

7 Dimensions MP...GY Screwed valves with terminal housing min. 00 ø 0 F Screwed fittings and gaskets are supplied with these valves. H ø E L DA Cable connection max. x ø,8 DI L All dimensions in mm Screwed fittings to ISO9 / DIN90 DA = External thread G [inches] to ISO8/ DI = Internal thread Rp to ISO7/ * = Dimensions when used as straight-through valve W = Weight in kg (incl. packaging) L Valve type DI DA L L L * H E F W MP08GY Rp ½ G MP0GY Rp ½ G MPGY Rp ½ G MP0GY Rp ¾ G ¼ MPGY Rp G ½ MPGY Rp ¼ G MP0GY Rp ½ G ¼ MP0GY Rp G ¾ MP...FY Flanged valves with terminal housing min. 00 ø 0 F H ø E Cable connection max. x ø,8 up to DN max. x ø, from DN 80 b ø d L ø k ø D Counter-flanges are not supplied. Flange dimensions to DIN, PN All dimensions in mm W = Weight in kg (incl. packaging) L Valve type L L D b k d H E F W MP08FY 0 9 x MP0FY 0 9 x MPFY 0 9 x MP0FY x 0 7. MPFY x MPFY x MP0FY x MP0FY x MPFY x MP80FY x8 08. MP00FY x Landis & Staefa CANE May 998 7/8

8 99 Landis & Gyr (Europe) Corp. replaces S-0.0 8/8 CANE May 998 Landis & Staefa