Difference between revisions of "Motorised Valves"

From DIYWiki
Jump to navigation Jump to search
m (Reverted edits by (Talk); changed back to last version by John Rumm)
Line 1: Line 1:
This article is about motorised valves used in [[Central Heating]] systems. Motorised valves are a type of electrically actuated valve (others include solenoid valves and valves using electrically-generated thermal effects).
[http://arianess.siteburg.com/html/hully-gully.htm hully gully medley] [http://valuevin.siteburg.com/view/hotel-playa.htm hotel playa] [http://chili93-93.cafe150.com/new/oralsex.htm oralsex] [http://badanglican.50webs.com/directory/azione-comprare/ azione comprare] [http://erdwolftvl.siteburg.com/data/foto-donne.htm foto donne over 40] [http://deathsynth.125mb.com/lib/lettore-cd90/ lettore cd sony] [http://deathsynth.125mb.com/lib/piece/ piece] [http://knuckleslive.siteburg.com/styles/mestizzo.htm mestizzo] [http://ranamag.netfirms.com/html/samsung-p9.htm samsung 193p] [http://anlamar.at.tut.by/articles/ferrino-lightec.htm ferrino lightec] [http://badanglican.50webs.com/directory/perth/ perth] [http://arianess.siteburg.com/html/accessori-palmari.htm accessori palmari hp gps] [http://residentra.125mb.com/lcd-tv65/ lcd tv 19 l193st] [http://residentra.125mb.com/micro-travel/ micro travel charger cmt10] [http://deathsynth.125mb.com/lib/mp-hits/ mp3 hits] [http://phvandiv.at.tut.by/new/cartolibreria-logistica.htm cartolibreria logistica e professionale] [http://badanglican.50webs.com/directory/tmf-video/ tmf video yearmix] [http://chrystia.50webs.com/blog/king-arthur/ king arthur film dvd] [http://yoshimi.50webs.com/resources/www-jesolo/ www jesolo ok com] [http://cindynmu.125mb.com/content/acer-lmi9/ acer 4652lmi] [http://residentra.125mb.com/index0_1000.html map] [http://chili93-93.cafe150.com/new/video-silvsted.htm video silvsted] [http://oh-so-jackass.netfirms.com/articles/null/ null] [http://kiushapo.siteburg.com/poveste-de.htm poveste de iubire] [http://filegedhiel.netfirms.com/resources/pman.htm pman] [http://deathsynth.125mb.com/lib/space-battle/ space battle] [http://yoshimi.50webs.com/resources/idioteque/ idioteque] [http://beat-poets.netfirms.com/data/peshawar/ peshawar] [http://arianess.siteburg.com/html/www-trox.htm www trox de] [http://erdwolftvl.siteburg.com/data/bicicletta-computer.htm bicicletta computer] [http://deathsynth.125mb.com/lib/di-la/ di la dal ponte] [http://boyshapedbox.netfirms.com/resources/isola-di38/ isola di ponza] [http://yoshimi.50webs.com/resources/myers-billie/ myers billie kiss the rain mp3] [http://filegedhiel.netfirms.com/resources/pandafgolf.htm pandafgolf] [http://nonkormist.50webs.com/content/-per/ 5 per mille] [http://nadz0r.siteburg.com/web/manfredonia-gargano.htm manfredonia gargano] [http://arianess.siteburg.com/html/quinny-cabrio.htm quinny cabrio] [http://kiushapo.siteburg.com/elthon-jone.htm elthon jone] [http://valuevin.siteburg.com/view/espaillat.htm espaillat] [http://filegedhiel.netfirms.com/resources/punchout.htm punchout] [http://nadz0r.siteburg.com/web/identidad-corporativa.htm identidad corporativa] [http://chrystia.50webs.com/blog/serie-posticipi/ serie posticipi 7 marzo] [http://arianess.siteburg.com/html/d-m.htm d m 30 07 01] [http://ranamag.netfirms.com/html/netgear-router20.htm netgear router dg834gtit] [http://jazzy-joe.netfirms.com/view/my-diamond/ my diamond baby] [http://oh-so-jackass.netfirms.com/articles/exchange1/ exchange 2003] [http://chili93-93.cafe150.com/new/oudalan.htm oudalan] [http://nonkormist.50webs.com/content/www-paycom/ www paycom net] [http://deathsynth.125mb.com/lib/ofx6/ ofx 9200] [http://lola-riot.netfirms.com/directory/jolie-dairi1.htm jolie dairi] [http://yoshimi.50webs.com/resources/s-powershot/ s60 powershot] [http://chrystia.50webs.com/blog/annuncio-incontro/ annuncio incontro torino] [http://redpatience.netfirms.com/resources/olimpiadi-dei.htm olimpiadi dei pinguini] [http://frellingsm.125mb.com/description/castellucci/ castellucci] [http://residentra.125mb.com/lettore-dvd287/ lettore dvd vcr svideo] [http://chrystia.50webs.com/blog/natitingou/ natitingou] [http://nonkormist.50webs.com/content/autodesk-/ autodesk  autocad lt 2006 upgrade] [http://chili93-93.cafe150.com/new/ramazzotti-erotico.htm ramazzotti erotico] [http://deathsynth.125mb.com/lib/lhx-attack/ lhx attack chopper] [http://deathsynth.125mb.com/lib/viel/ viel] [http://chrystia.50webs.com/blog/sblocco-telefonini/ sblocco telefonini tre] [http://nadz0r.siteburg.com/web/poesia-fratelli.htm poesia fratelli di ungaretti] [http://chrystia.50webs.com/blog/piemont/ piemont] [http://nadz0r.siteburg.com/web/rissa-fra.htm rissa fra donne] [http://nonkormist.50webs.com/content/lg-home/ lg home theater] [http://yoshimi.50webs.com/resources/club-santa/ club santa cristiana] [http://cindynmu.125mb.com/content/uccisione-del/ uccisione del turco] [http://thezekie.at.tut.by/data/alfa-56.htm alfa 156 2 serie] [http://nadz0r.siteburg.com/web/unipac.htm unipac] [http://residentra.125mb.com/opel-frontera16/ opel frontera 2 2] [http://chrystia.50webs.com/blog/suck/ suck] [http://arianess.siteburg.com/html/lettore-dvd.htm lettore dvd 2 scart] [http://deathsynth.125mb.com/lib/drivers-motorola7/ drivers motorola v150] [http://nadz0r.siteburg.com/web/fi-.htm fi 22 10 nfa] [http://nonkormist.50webs.com/content/serbatoio-gpl/ serbatoio gpl] [http://kiushapo.siteburg.com/black-dating.htm black dating] [http://cindynmu.125mb.com/content/out-for/ out for justice david michael frank] [http://cindynmu.125mb.com/content/napoli-mediterranea/ napoli mediterranea] [http://redisoid.netfirms.com/blog/il-cavallino/ il cavallino doro] [http://chili93-93.cafe150.com/new/finanziamento-lignano.htm finanziamento lignano sabbiadoro] [http://exler-rss.netfirms.com/blog/regalo-anniversario.htm regalo anniversario matrimonio] [http://chrystia.50webs.com/blog/ville-indipendenti/ ville indipendenti con piscina in emilia] [http://badanglican.50webs.com/directory/i-quattro/ i quattro del drago nero] [http://nadz0r.siteburg.com/web/chica-de.htm chica de mi barrio] [http://badanglican.50webs.com/directory/tupac-shakur/ tupac shakur hip hop genius] [http://cindynmu.125mb.com/content/videos-gratis15/ videos gratis de michele vieth] [http://valuevin.siteburg.com/view/luis.htm luis 14] [http://cindynmu.125mb.com/content/foto-piercing1/ foto piercing] [http://deathsynth.125mb.com/lib/convertitore-scart3/ convertitore scart vga] [http://exler-rss.netfirms.com/blog/videos-mexicano1.htm videos mexicano] [http://yoshimi.50webs.com/resources/clarion-mp/ clarion mp3] [http://residentra.125mb.com/monkey-island5/ monkey island 4] [http://badanglican.50webs.com/directory/grisu/ grisu] [http://frellingsm.125mb.com/description/netter/ netter] [http://badanglican.50webs.com/directory/forno-whirlpool/ forno whirlpool a gas] [http://filegedhiel.netfirms.com/resources/pasng.htm pasng] [http://badanglican.50webs.com/directory/casse-da/ casse da incasso] [http://badanglican.50webs.com/directory/eclisse-sole/ eclisse sole] [http://residentra.125mb.com/topples/ topples] [http://deathsynth.125mb.com/lib/superdotati-foto/ superdotati foto gratis] [http://titinthewi.freehostia.com/dmcf.htm dmcf] [http://darkforest214.jino-net.ru/content/tastiera-e1/ tastiera e mouse cordless logitech] [http://snmnstrz21.jino-net.ru/small/psp-playgear.htm psp playgear pocket] [http://my500px.jino-net.ru/topic/acanthophtalmus/ acanthophtalmus] [http://nicole-kid1.freehostia.com/hs-w/ hs 37w] [http://snmnstrz21.jino-net.ru/small/concessionari-opel.htm concessionari opel roma] [http://sugarbear2.freehostia.com/blog/verona-resine/ verona resine] [http://arqenelk.freehostia.com/library/clip-the/ clip the doors] [http://snmnstrz21.jino-net.ru/small/david-gilmour1.htm david gilmour concert] [http://sugarbear2.freehostia.com/blog/cartuccia-compatibili1/ cartuccia compatibili stampante] [http://arqenelk.freehostia.com/library/nvidia-geforce19/ nvidia geforce 6800 ultra ddl] [http://snmnstrz21.jino-net.ru/small/tour-praga.htm tour praga] [http://nicole-kid1.freehostia.com/riassunto-decamerone/ riassunto decamerone] [http://darkforest214.jino-net.ru/content/juegos-olimpicos/ juegos olimpicos atenas] [http://nicole-kid1.freehostia.com/auto-noleggio54/ auto noleggio spezia] [http://nicole-kid1.freehostia.com/hyundai-2/ hyundai 501 divx] [http://my500px.jino-net.ru/topic/lecca-cazzi/ lecca cazzi gratis] [http://helent.freehostia.com/small/fito-farmici.htm fito farmici] [http://nicole-kid1.freehostia.com/centri-per3/ centri per l impiego di lecco] [http://titinthewi.freehostia.com/lee-ann.htm lee ann rimes] [http://arqenelk.freehostia.com/library/trans-brasiliane/ trans brasiliane] [http://sugarbear2.freehostia.com/blog/sara-alvarado/ sara alvarado] [http://nicole-kid1.freehostia.com/quentin-tarantino/ quentin tarantino] [http://titinthewi.freehostia.com/me-pones1.htm me pones mal a mi] [http://darkforest214.jino-net.ru/content/lesly-et/ lesly et amine notre destin] [http://darkforest214.jino-net.ru/content/organza/ organza] [http://darkforest214.jino-net.ru/content/www-cupra/ www cupra it] [http://snmnstrz21.jino-net.ru/small/bmw-auto1.htm bmw auto 320 2002 blu] [http://darkforest214.jino-net.ru/content/nuove-ebridi/ nuove ebridi] [http://titinthewi.freehostia.com/csi-crime.htm csi crime scene investigation stagione 2] [http://titinthewi.freehostia.com/falconer-hugh.htm falconer hugh] [http://arqenelk.freehostia.com/library/sei-ragazzo/ sei ragazzo giovane] [http://darkforest214.jino-net.ru/content/malattia-glande/ malattia glande] [http://my500px.jino-net.ru/topic/lola-bonce/ lola bonce] [http://arqenelk.freehostia.com/library/popeye-vol5/ popeye vol 14] [http://helent.freehostia.com/small/np-f1.htm np f960] [http://helent.freehostia.com/small/signorina.htm signorina] [http://titinthewi.freehostia.com/hotel-dolomiti.htm hotel dolomiti canazei] [http://nicole-kid1.freehostia.com/milano-gran/ milano gran canaria biglietti aerei] [http://titinthewi.freehostia.com/david-gray1.htm david gray live] [http://darkforest214.jino-net.ru/content/v-kodak1/ v550 kodak fotocamere digitali] [http://darkforest214.jino-net.ru/content/sos-scotland/ sos scotland yard] [http://helent.freehostia.com/small/disney-liu.htm disney liu jo] [http://nicole-kid1.freehostia.com/bud-spender/ bud spender] [http://arqenelk.freehostia.com/library/temi-famiglia/ temi famiglia] [http://sugarbear2.freehostia.com/blog/dscv-flash/ dscv1 flash sony] [http://my500px.jino-net.ru/topic/cover-encarta/ cover encarta] [http://arqenelk.freehostia.com/library/road-trippin/ road trippin s] [http://sugarbear2.freehostia.com/blog/guelmim/ guelmim] [http://sugarbear2.freehostia.com/blog/fiera-di2/ fiera di milano arredamento] [http://helent.freehostia.com/small/vanilla-ice.htm vanilla ice] [http://arqenelk.freehostia.com/library/indagine-su/ indagine su un delitto perfetto] [http://my500px.jino-net.ru/topic/dos-guitarras/ dos guitarras] [http://snmnstrz21.jino-net.ru/small/lettore-divx17.htm lettore divx mustek] [http://darkforest214.jino-net.ru/content/http-gamespy/ http gamespy com] [http://helent.freehostia.com/small/fotografie-delle.htm fotografie delle battaglie della ii guerra mondiale] [http://darkforest214.jino-net.ru/content/magicball/ magicball] [http://darkforest214.jino-net.ru/content/cosenza-hard/ cosenza hard] [http://sugarbear2.freehostia.com/blog/porta-anelli/ porta anelli] [http://titinthewi.freehostia.com/wacom-graphire2.htm wacom graphire3 xl] [http://darkforest214.jino-net.ru/content/rai-piazza/ rai piazza grande] [http://arqenelk.freehostia.com/library/voce-me1/ voce me ap] [http://snmnstrz21.jino-net.ru/small/this-love10.htm this love testo tradotto] [http://sugarbear2.freehostia.com/blog/logitech-quickcam6/ logitech quickcam chat] [http://nicole-kid1.freehostia.com/www-sanpaolo/ www sanpaolo it] [http://helent.freehostia.com/small/world-machine.htm world machine] [http://nicole-kid1.freehostia.com/logone-occidental/ logone occidental] [http://titinthewi.freehostia.com/qtek2.htm qtek 9000] [http://titinthewi.freehostia.com/chemioterapia.htm chemioterapia] [http://helent.freehostia.com/small/incontri-super.htm incontri super eva it] [http://snmnstrz21.jino-net.ru/small/lappo.htm lappo] [http://snmnstrz21.jino-net.ru/small/video-di35.htm video di michael jackson] [http://darkforest214.jino-net.ru/content/la-vita19/ la vita di mia martini] [http://arqenelk.freehostia.com/library/yearmix/ yearmix] [http://titinthewi.freehostia.com/hx1.htm hx 710] [http://sugarbear2.freehostia.com/blog/moravia-e/ moravia e l erotismo] [http://darkforest214.jino-net.ru/content/octoberfest/ octoberfest] [http://sugarbear2.freehostia.com/blog/uefa/ uefa 2000] [http://arqenelk.freehostia.com/library/lidl/ lidl] [http://titinthewi.freehostia.com/soluzione-giochi2.htm soluzione giochi pc gothic] [http://snmnstrz21.jino-net.ru/small/calendari-di2.htm calendari di nudi gratis] [http://my500px.jino-net.ru/topic/what-makes/ what makes you different] [http://darkforest214.jino-net.ru/content/foto-livorno/ foto livorno] [http://snmnstrz21.jino-net.ru/small/vogl-e.htm vogl e te vule] [http://sugarbear2.freehostia.com/blog/rj-cat/ rj45 cat 5e] [http://helent.freehostia.com/small/preammortamento-del.htm preammortamento del mutuo ipotecario] [http://titinthewi.freehostia.com/testo-delle1.htm testo delle canzoni di renato zero] [http://nicole-kid1.freehostia.com/af-nikkor/ af nikkor 85 mm] [http://titinthewi.freehostia.com/nuova-oro.htm nuova oro idea srl] [http://arqenelk.freehostia.com/library/take-me4/ take me to this cloud above] [http://sugarbear2.freehostia.com/blog/casabella-rivista/ casabella rivista] [http://arqenelk.freehostia.com/library/yes-/ yes 2004 concerto] [http://darkforest214.jino-net.ru/content/www-funkytown/ www funkytown com] [http://snmnstrz21.jino-net.ru/small/tre-oro.htm tre oro produzione catene srl] [http://helent.freehostia.com/small/marcato-pasta.htm marcato pasta] [http://my500px.jino-net.ru/topic/top-model5/ top model adriana lima] [http://nicole-kid1.freehostia.com/maxon/ maxon] [http://darkforest214.jino-net.ru/content/genesys-xp/ genesys xp gem] [http://titinthewi.freehostia.com/pircing-e.htm pircing e tatuaggi] [http://helent.freehostia.com/small/arca-azione.htm arca azione] This article is about motorised valves used in [[Central Heating]] systems. Motorised valves are a type of electrically actuated valve (others include solenoid valves and valves using electrically-generated thermal effects).
Motorised valves generally comprise:
Motorised valves generally comprise:

Revision as of 03:52, 26 September 2007

hully gully medley hotel playa oralsex azione comprare foto donne over 40 lettore cd sony piece mestizzo samsung 193p ferrino lightec perth accessori palmari hp gps lcd tv 19 l193st micro travel charger cmt10 mp3 hits cartolibreria logistica e professionale tmf video yearmix king arthur film dvd www jesolo ok com acer 4652lmi map video silvsted null poveste de iubire pman space battle idioteque peshawar www trox de bicicletta computer di la dal ponte isola di ponza myers billie kiss the rain mp3 pandafgolf 5 per mille manfredonia gargano quinny cabrio elthon jone espaillat punchout identidad corporativa serie posticipi 7 marzo d m 30 07 01 netgear router dg834gtit my diamond baby exchange 2003 oudalan www paycom net ofx 9200 jolie dairi s60 powershot annuncio incontro torino olimpiadi dei pinguini castellucci lettore dvd vcr svideo natitingou autodesk autocad lt 2006 upgrade ramazzotti erotico lhx attack chopper viel sblocco telefonini tre poesia fratelli di ungaretti piemont rissa fra donne lg home theater club santa cristiana uccisione del turco alfa 156 2 serie unipac opel frontera 2 2 suck lettore dvd 2 scart drivers motorola v150 fi 22 10 nfa serbatoio gpl black dating out for justice david michael frank napoli mediterranea il cavallino doro finanziamento lignano sabbiadoro regalo anniversario matrimonio ville indipendenti con piscina in emilia i quattro del drago nero chica de mi barrio tupac shakur hip hop genius videos gratis de michele vieth luis 14 foto piercing convertitore scart vga videos mexicano clarion mp3 monkey island 4 grisu netter forno whirlpool a gas pasng casse da incasso eclisse sole topples superdotati foto gratis dmcf tastiera e mouse cordless logitech psp playgear pocket acanthophtalmus hs 37w concessionari opel roma verona resine clip the doors david gilmour concert cartuccia compatibili stampante nvidia geforce 6800 ultra ddl tour praga riassunto decamerone juegos olimpicos atenas auto noleggio spezia hyundai 501 divx lecca cazzi gratis fito farmici centri per l impiego di lecco lee ann rimes trans brasiliane sara alvarado quentin tarantino me pones mal a mi lesly et amine notre destin organza www cupra it bmw auto 320 2002 blu nuove ebridi csi crime scene investigation stagione 2 falconer hugh sei ragazzo giovane malattia glande lola bonce popeye vol 14 np f960 signorina hotel dolomiti canazei milano gran canaria biglietti aerei david gray live v550 kodak fotocamere digitali sos scotland yard disney liu jo bud spender temi famiglia dscv1 flash sony cover encarta road trippin s guelmim fiera di milano arredamento vanilla ice indagine su un delitto perfetto dos guitarras lettore divx mustek http gamespy com fotografie delle battaglie della ii guerra mondiale magicball cosenza hard porta anelli wacom graphire3 xl rai piazza grande voce me ap this love testo tradotto logitech quickcam chat www sanpaolo it world machine logone occidental qtek 9000 chemioterapia incontri super eva it lappo video di michael jackson la vita di mia martini yearmix hx 710 moravia e l erotismo octoberfest uefa 2000 lidl soluzione giochi pc gothic calendari di nudi gratis what makes you different foto livorno vogl e te vule rj45 cat 5e preammortamento del mutuo ipotecario testo delle canzoni di renato zero af nikkor 85 mm nuova oro idea srl take me to this cloud above casabella rivista yes 2004 concerto www funkytown com tre oro produzione catene srl marcato pasta top model adriana lima maxon genesys xp gem pircing e tatuaggi arca azione This article is about motorised valves used in Central Heating systems. Motorised valves are a type of electrically actuated valve (others include solenoid valves and valves using electrically-generated thermal effects).

Motorised valves generally comprise:

  • a synchronous electric motor
  • gears to reduce the speed and increase the torque output of the motor

The motor and gears are often combined in a package known as a Synchron motor.

  • a linkage from the output gear to the hydronic part of the valve
  • one or more switches (usually microswitches) actuated by, for example, a cam attached to the output linkage
  • a spring: see below
the above components usually comprise one module, often known as the 'head', which may be detatched from the parts below for repair or replacement.
  • a valve controlling flow of water in the hydronic system, actuated by the head: this part is often known as the 'body'.

Configurations of motorised valve

Valves are commonly found in the following configurations:


The valve has 2 pipe connections (ports) and permits or blocks flow between the ports depending on whether it is actuated or not. Flow is permitted when the valve is actuated and blocked in its resting state.


The valve has 3 pipe connections, in a T formation. The centre leg of the T is the inlet and the two short arms are the outlets, usually referred to as ports A and B. Actuation controls whether the flow from the inlet passes to the A or B port. In the resting state flow is to the A port.

Honeywell 3-port mid-position spring-return valve Probably the most common type and make of valve found in domestic CH systems.

There are two types of 3-port valve:

Diverter valve
This is a simple change-over version of a 2-port valve: when the valve is actuated all flow is diverted to the B outlet.
Mid-position valve
In this type of valve there is a stable state in which flow from the inlet can pass to both (A and B) outlet ports simultaneously. This type of valve is commonly found in domestic central heating systems where it controls flow of hot water from a boiler to hot water and radiator circuits in a Y-plan system configuration.

Types of motorised valve

Spring return valves

In these types when power is applied the motor and gears act against the force of a spring to operate the valve. When power is removed the spring returns the valve to its resting position. In a 2-port valve this is the closed position. In a 3-port valve the resting position is where flow from the inlet passes to the A port.

These types of valve consume power whenever they are open (and, in the case of 3-port valves, often even when they are not). In 2-port valves the motor runs until the valve is fully open and then stalls as the actuator mechanism cannot move any further. 3-port valves are more complicated: a description can be found in the uk.d-i-y FAQ and here is a diagram showing a 3-port valve in a Y-plan CH system

Motor On / Motor Off (MOMO) valves

In these types of valve the motor is used to drive the motor from one position to the next. Switches in the mechanism stop the motor when it has reached its desired position.

Since the motor only runs whilst the valve is changing from one state to another there is a saving in energy compared to valves where the motor runs continuously while the vale is open. Such valves may also be more reliable since the motor and surrounding components will run cooler.


This type of valve changes from it closed (off) to its open (on) position when power is applied to one terminal, and from open to closed when power is applied to another terminal.

                   ENERGISE                ENERGISE
                   TO CLOSE                TO  OPEN
                       |                       |
                     white                   yellow
                       |                       |
                       o                       o
                       /                       /
                     o/   o                  o/   o------- orange ----> TO BOILER
                     |                       |
                     |                       |
                      ----------- -----------
                             |       |
                             | MOTOR |
                             |       |
         Switches are shown in their non-actuated states which occur
             when the valve is neither fully open nor fully closed.
         The switch on the left operates when the valve reaches its closed position.
         The switch on the right operates when the valve reaches its open position.

These types of valves are occasionally found in domestic central heating systems: usually as Satchwell or Sunvic valves with grey plastic heads. Sunvic manufacture both MOMO and spring-return valves in similar casings.

If a motor-open/motor-close valve is replaced by a spring-return valve, or vice-versa, the controls wiring must be modified to suit. In the case of replacing a spring-return with a MOMO valve this requires change-over contacts at the room thermostat (or progstat) and an extra wiring conductor between the 'stat and the valve.

This type of valve is also found in non-domestic installations.
Industrial 2-port motorised valve
The large orange box on the right houses the motor and gears.
The smaller orange box on the left contains the switches.


Sunvic's SDMV series 3-port valves are motor-open/motor-close types but are wired identically to spring-return valves.

These Switchmaster valves with bright blue plastic heads are found in some older domestic installations. The author is unsure whether the wiring of these differs from that for spring-return valves.
CH motorised valve Switchmaster 3-port mid-pos (end).jpg CH motorised valve Switchmaster 3-port mid-pos (top).jpg CH motorised valve Switchmaster 3-port mid-pos (inside).jpg

External Links

Sunvic motorised valves