General description
The MEV-12-ASFFA-30/30/A is a proportional 4/3-way valve. It is usually required as part of an overall configuration (see also sample configuration).Conventional directional valves control the start, stop and direction of movement of hydraulic motors and cylinders. However, the speed of these hydraulic consumers depends on the load pressure. If this load pressure varies then the speed is hardly controllable.
The M-Series AMCA Proportional directional valves are pressure-compensated and achieve ideal control of force, speed, acceleration and deceleration, regardless of load and increased requirements.
What are the advantages of AMCA proportional directional valves?
The shape of the AMCA proportional directional control valve spool differs from the conventional one. The result is a progressive flow curve. In order to make optimal use of the maximum stroke of the spool, the flow angles of the A and/or B port can be defined for the different flows. For a constant flow, the pressure drop over the orifice of the spool remains constant, independent of the load pressure.
Example Configuration
Below is a complete example configuration consisting of a MEV, the subplates and the pressure limiting valve is shown. The details of the configuration of the MEV can be found in the configuration key shown below.
Function
The function of the proportional directional valve with electrically controlled pilot section (MEV) is explained below. When the solenoid a is actuated, it pushes the control spool in the direction of solenoid b and opens the spool cross-section 1. This releases control pressure on the spring chamber 1 (speed controlled by the adjustable throttle 5) as well as through the hole 3 to the end of the spool opposite the solenoid a. The balancing force on the control valve is the force of the solenoid, which is proportional to the electrical input signal. The balancing force corresponds to the control pressure in solenoid b and also in the spring chamber 1. This pressure presses the main valve against the spring in the spring chamber 2 and thus occupies a position proportional to the electrical input signal. With the screws on the spring chambers, the maximum flow can be limited in which the screws are screwed in and thus limit the main valve in its stroke.
The simplified hydraulic schematic is shown below.
Details
This valve is a proportional 4/3-way valve in subplate design of nominal size 12; The maximum operating pressure is 350 bar, the maximum volume flow is 30 l/min, the driving magnet is a version in 12 VDC and IP65 with (pin) emergency manual actuation (5070A100007).Spool type is an A-spool.
Configuration key
The following is the general configuration key of the MEV series.
Hydraulic Data
max. operating pressure (P,A,B): 350 bar (5000 psi)max. return pressure (T):
- aluminium spring caps: 15 bar (214 psi)
- cast iron spring cap: 30 bar (428 psi)
Δp compensator: 3; 6; 8 and 12 bar (43; 86; 114 and 172 psi)
pressure setting range: 5...350 bar (72...5000 psi)
max. flow: 800 l/min (211 USgpm) - at 32 cSt and 40°C
Hysteresis: 3...8% (50...800 l/min (13...211 USgpm))
mounting position: Optional
Max. flow rate in l/min. (USgpm) based on Δp in bar (psi) over the compensator per nominal bore diameter:
The max response time of the MEV-series is shown below.
The max pressure drop A/B->T ist is shown in the following diagram. This curve is measured by means of a C-spool at max. opening A/B-T at a viscosity of 32 cSt, inclusive the subplate and ports.
Fluid-Requirements
Fluid: Mineral oil according to DIN 51524/51525Oil operating temperature range: -35°C…+80°C (-31°...+176°F)
Operation viscosity range: 2,8…380 cSt, opt. 30cSt
Required cleanliness level according to NAS 1638: Class 9
Required cleanliness level according to ISO 4406: 18/15/x
Port sizes
Sizes of ports (Subplate)MEV12: 1/2" BSP (SAE optional)
MEV16: 3/4" BSP (SAE optional)
MEV20: 1" BSP (SAE optional)
MEV25: 1 1/4" BSP (SAE optional)
MEV32: 1 1/2" BSP (SAE optional)
Electrical data
Nominal operation voltage: 12 V, 24 VNominal operation current: 12 VDC = 1.400 mA ; 24 VDC = 700 mA
Operation cycle: 100%
Protection class: IP 65, optional IP67/II 2 EEx m II T4
Recommended dither frequency: 100Hz
Dimensions
Subsequently important dimension of the MEV are shown.
Support by Fluitronics
FLUITRONICS designes and produces customer specific solutions as well as components in the field of drive technology.For any technical question regarding sectional valve series of FLUITRONICS, e.g. the APV series or the M-Series, pls. contact: TecSupport@fluitronics.com
International partner network
The mobile valve series is distributed globally. In some countries FLUITRONICS cooperates with local partners and their network, who do have the required competencies, market access and who provide solutions on basis of the FLUITRONICS components. Attached pls. find an overview about the local partner network:
Australia:
K-One Fluid Power - Perth
Unit 1, 1 Dampier Road
Welshpool WA Australia 6106
Contact: person: David Hepburn
Phone: (+61 8) 9358 2300
Fax: (+61 8) 9358 2322
Email: orders@k-1fluidpower.com
K-One Fluid Power - Sydney
Unit 13, 43 Sterling Road
Minchinbury NSW Australia 2770
Contact: person: Morgan Skelton
Phone: (+61 2) 9674 4900
Fax: (+61 2) 9674 4985
Email: orders@k-1fluidpower.com
Belgium:
REM-B
Rouwebergskens 5
2340 Beerse
Contact person: Stef Boeckx
Telephone: 0032 14 622 860
Mail: info@remb.be
Website: www.remb.be
Canada:
P.S.I. Fluid Power
Edmonton Office
4210 51 Ave NW
Edmonton, Alberta,
Canada
T6B 3B5
Phone: (780) 452-1594
Fax: (780) 452-0491
Calgary Office
4020-11A Street SE
Calgary, Alberta,
Canada
T2G 3H3
Phone: (403) 253-2236
Fax: (403) 258-3165
Red Deer Office
7597 Edgar Industrial Drive
Red Deer, Alberta, Canada
T4P 3R2
Phone: (403) 358-4212
Fax: (403) 358-7614
Vancouver Office
13771 Mayfield Place
Richmond, British Columbia, Canada
V6V 2G9
Phone: (604) 278-4481
Fax: (604) 278-7693
Contact person: John Zanata
John Zanata Email: jzanatta@psifp.com
Chile:
Electrohidraulica
Espana 7963
La Cisterna, Santiago
Contact person:
Luis Mardones
Phone: +56 2 5582128
Email: luismardones@electrohidraulica.cl
Website: www.electrohidraulica.cl
Estonia:
DIDO Vennad OÜ
Ringtee 27
50105 Tartu
Estonia
Telephone: +376 5664 3687
Mail: info@didohydraulika.ee
Website: www.didohydraulika.ee
Germany:
Fluitronics GmbH
Europark Fichtenhain B2
47807 Krefeld Germany
Telephone: +49 (0)2151 4589 0
Mail: info@fluitronics.com
Website: www.fluitronics.com
Suffel Foerdertechnik GmbH & Co. KG
Wailandtstrasse 11
63741 Aschaffenburg
Phone: +49 6021 8645-29
Mail: hydraulik-neugeschaeft@suffel.com
Israel:
Shir Techno-Trade LTD.
34 Hahofer St., Industrial Area,
Holon,
TEL: 972-3-5501440
FAX: 972-3-5501421
Email: purchase@techno-trade.biz
Website: http://www.techno-trade.biz
The Netherlands:
DÉGRA Winches and Hydraulics.
James Wattstraat 2
3281 NK Numansdorp
Telephone: 0031 186-652189
Email: Info@degra.com
Website: www.degra.com
Norway:
Kolberg Caspary Lautom AS
Røykenveien 70
1386 Asker
Contact person: Olaf Fled & Tore Olsen
Phone: +47 46 54 71 61
Email: hydraulikk@kcl.no
Website: www.kcl.no
Russia:
Adamko Controls Ltd.
Saint Petersburg Office
Sverdlovsk nab. 44, BC “ZIMA”, of. 321
Saint Petersburg, Russia
Phone: 007 812 3132207
Email: info@adamko-controls.ru
Website: www.adamko-controls.ru
Scotland:
ITC Hydraulic Services Ltd
The Garage
St Katherines, Inverurie
Aberdeenshire AB51 8SN
Telephone: +44 (0)1651 891626
Mail: ian@itc-hydraulics.co.uk
Website: www.itc-hydraulics.co.uk
Spain:
Hine Industrial
Pol. Ind. Karobi, 6005
20212 Olaberria
Apdo. 60 – Beasain
Contact person: Jose Carlos Fernández
Telephone: 0034 986 473 912
Mail: galicia@hine.es
Website: www.hine.es
Turkey:
Hidroport Mühendislik
OOstim OSB Mah.
100. Yıl Bulvarı No: 64
Yenimahalle / ANKARA
Telephone: +90 312 385 10 02
Fax: +90 312 385 20 03
Email: info@hidroport.com
Website: www.hidroport.com
United Kingdom:
Hercules Hydraulics Ltd
Unit 33 Torbay Business Park
Woodview Road
Paignton
Devon TQ4 7HP
Contact person: Ryan Langley
Telephone: 0044 1803 666623
Mail: ryan@herculeshydraulics.co.uk
Website: www.herculeshydraulics.co.uk
USA:
Spencer Fluid Power
Kent, Washington
19308 68th Ave. S.
Kent, WA 98032
Phone: 253-796-1100
Branch manager: Mike Anderson
Spencer Fluid Power
Portland, Oregon
2230 NE Columbia Blvd
Portland, OR 97211
Phone: 503-249-2835
Toll Free: 800-257-1002
Branch Manager: Ozzie Park
Spencer Fluid Power
Modesto, California
1064 Woodland Ave. Suite T
Modesto, CA 95351
Phone: 209-549-0800
Toll Free: 800-549-2730
Branch Manager: Doug Otteraaen
Spencer Fluid Power
Salt Lake City, Utah
2206 S 2000 West
Salt Lake City, UT 84119
Phone: 801-972-8316
Toll Free: 800-975-7278
Branch Manager: Chad Gibson
Spencer Fluid Power
Fontana, California
11897 Cabernet Dr., Ste. C
Fontana, CA 92337
Phone: 951-360-5808
Toll Free: 800-860-6611
Branch Manager: Doug Otteraaen
Spencer Fluid Power
Boise, Idaho
7417 W. Mossy Cup St.
Boise, ID 83709
Phone: 208-362-5655
Toll Free: 800-784-1394
Branch Manager: Clint Richins
Spencer Fluid Power
Yakima, Washington
1930 Rudkin Rd.
Yakima, WA 98903
Phone: 509-248-0580
Toll Free: 800-572-8351
Branch Manager: Ozzie Park
Spencer Fluid Power
Billings, Montana
410 Bernard St.
Billings, MT 59101
Phone: 406-248-7431
Toll Free: 800-877-1090
Branch Manager: Mitch King
Spencer Fluid Power
Gillette, Wyoming
3201 LeTourneau Dr.
Gillette, WY 82718
Phone: 307-682-5858
Toll Free: 800-788-5858
Branch Manager: Shannon Ewing
Carolina Fluid Components
Charlotte, North Carolina
9309 Stockport Place
Charlotte NC 28273
Phone: (704) 588-6101-2880
Toll Free: (704) 887-0880
Project Manager: Adam C. Rushing
M-series MEV product broschure