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RCS • Constant air volume control dampers made of steel

  • Circular
  • Galvanized steel
  • 50-500 Pa

Adjustable self-regulating constant air volume control dampers in galvanised steel.

To be used to regulate the air flow at pressures between 50 and 500 Pa and temperatures between 0°C and 50°C.

Application

  • For air flow rate regulation in ventilation and air conditioning systems with following air flow rates and duct sizes
    • Ø100: to be set between 57 & 283m³/h
    • Ø125: to be set between 88 & 442m³/h
    • Ø160: to be set between 145 & 723m³/h
    • Ø200: to be set between 226 & 1130m³/h
    • Ø250: to be set between 353 & 1766m³/h
    • Ø315: to be set between 561 & 2804m³/h
    • Ø355: to be set between 713 & 3563m³/h
    • Ø400: to be set between 904 & 4522m³/h
  • Accuracy: +/- 10% of the set air volume for air velocity above 3m/s
  • Accuracy of the air flow rate setting scale is +/-4%

Material

  • Galvanized steel housing
  • Galvanized steel regulation blade with control bellows and leaf spring

Composition

  • Round housing made out of laser welded galvanised steel in standard duct sizes
  • Airthight connection class C with EPDM rubber complies with EN1751
  • Autoregulating and balanced blade mounted in brass bearings

Mounting

  • To be inserted at both sides into a round duct and to be equipped with a silencer if necessary
  • RCS should be installed in accordance with the air flow direction which is marked with an arrow on the device’s housing.
  • To ensure the proper operation of the device, please observe the following rules during the installation: straight section length before the regulator 3 D, after the regulator 1.5 D
  • Horizontal or vertical mounting

Accessories

  • Stainless steel models or insulation shells available upon request

Text for tender

Copy
  • CAV regulators are used for autonomous constant air flow control in ventilation installations. They maintain constant air volumes regardless of the changes of static pressure in the ventilation duct. They operate autonomously without any external power supply. Regulation range is from 2 to 10 m/s, operating pressure from 50 to 500 Pa. The casing has an air tightness class C that complies with EN 1751. The housing and the blade of the regulator are made of galvanised steel, whereas the axis of the blade is fastened in brass bearings.
    The changes of set values can be made independently by the user. The regulator is delivered with default factory settings, but it is possible to order factory settings by specifying the requested air flow rates. The accuracy of the regulation of volumetric air flow in relation to the set value is +/-10% (for air velocities above 3m/s). The accuracy of the air flow setting scale is +/-4%. Errors in adjustment can increase, when there is interference due to the variable duct cross section, a lack of recommended straight segments before and after the regulator, bends, sharp edges, a narrowing in the duct, etc.

    Main Advantages:

    • Operating range 2 – 10 m/s

    • Operating pressure 50 – 500 Pa

    • Possibility of changing settings by the user

    • Possibility of providing the version with an actuator

    • Air tightness class C complies with EN 1751

    • The device does not require any electric power supply (for the version without an actuator)

    • Can be used both in ventilation air supply and air extraction ducts

    • Can be mounted both vertically and horizontally

  • Cairox Type RCS

Order example

  • RCS, 125

Explanation

RCS = Type of constant air valve

125 = Duct diameter

Dimensions

RCS

ØD [mm]

L1 [mm]

L2 [mm]

100

98

270

350

125

123

270

350

160

158

270

350

200

198

270

350

250

248

270

350

315

313

270

350

355

353

270

350

400

398

270

350

Sound data

RCSdP=100Pa
Lw air regenerated noise [dB]Lw case radiated noise [dB]
(without insulation)
Øv
[m/s]
Q
[m³/h]
63Hz125Hz250Hz500Hz1kHz2kHz4kHz8kHzLw [dB(A)]63Hz125Hz250Hz500Hz1kHz2kHz4kHz8kHzLw [dB(A)]
100257665043403428211744311812191716<10<1022
4113695346433731242247342115222019121225
6170725650464034282650372419252322161628
8226755953494237313053402722282525192031
10283796357534541353557443126322829232535
125288534942423730231943271912181510<10<1020
4177585245454033262446322215211813101223
6265625649484336302849362619242116141626
8353655952514539333252392922272319172029
10442706356554843373756443326312623212533
1602145585345423937272545333025242928182133
4289615648454240302948363328273231212536
6434645952484543343251393632303534252839
8579686356524847383755434036343838293343
10723716659555050414158464339374041323746
2002226554939383736332643343224232325241731
4452585242414039363046373527262628272134
6678625646444343403550413931292932312637
8904666050484646433953454335333235343041
101130696353514849464356484638363438373444
2502353453940413838332444262426272527241532
4707504443444141362947312929302830272035
61060544847474445403351353333333134312439
81413585351514748433754393837373437342842
101766625754544951464157434240403640373245
3152561524741414039342445353328272728251533
41122565044444342372948393631303031282036
61682605448474645413351434035333334322440
82243645852514949453855474439373638362943
102804676155545152484258504742403841393346
3552712454344465253392857403230303228222135
41425555149495455453659433635353634272240
62137625855515557504261454039383837292343
82849676157525658524562474241404040312445
103561716557535659544863484343424142322547
4002904505145475050423554333536404446362049
41809535548505353453857363939434749392352
62713575951535556484260404342464952422755
83617616355565859514663444746495255453158
104522646758586061544965475149515457483460
Ø dP=300Pa
Lw air regenerated noise [dB]Lw case radiated noise [dB]
(without insulation)
v
[m/s]
Q
[m³/h]
63Hz125Hz250Hz500Hz1kHz2kHz4kHz8kHzLw [dB(A)]63Hz125Hz250Hz500Hz1kHz2kHz4kHz8kHzLw [dB(A)]
100257725651464238333051372420252526212031
4113755954494541363554402723282829242534
6170786258524844403957433027313132282937
8226816561555047434360463330343335313340
10283856965595351474864503734383639353844
125288595550484540353250332520242320192028
4177645853514843383753382823272623222531
6265686257545146424157423227302926262935
8353716560575349454559453530333129293338
10442766964615653495063503934373433333842
1602145635953484747393547383633303738303133
4289666256515050423956413936334041333545
6434696560545353464259444240364344373848
8579736964585657504763484644404648414352
10723767267615860535066514947434851444655
2002226605547454547453652393832303136362741
4452635850484850484055424135333439393144
6678676254515154524559464539363743433648
8904716658555457554962504943404046464051
101130746961585660585265535246434249494354
2502353594848484648443453403334343337352542
4707645351514951473956453837373640383045
61060685755545255514360494241403944423448
81413726259585558544763534745444247453852
101766756662615761575051565148474450484141
3152561585349474849463754413936333538372843
41122625652505152494257454239363841403346
61682666056535455534660494643394144443749
82243706460575759575164535047434448484253
102804736763605962605567565350464651514656
3552712515253545859554563433738404042332646
41425606057565960585065503741434344382949
62137696664586060605266545044454546403051
82849737065596061615467574847464647423252
103561787365606162615668595149474748443253
4002904605853535759524363434244465155462858
41809636256566062554666464647495458493161
62713676659596265585068505050525661523564
83617717063626568615472545454555964553967
104522747466646770645774575857576166584269
Ø dP=500Pa
Lw air regenerated noise [dB]Lw case radiated noise [dB]
(without insulation)
v
[m/s]
Q
[m³/h]
63Hz125Hz250Hz500Hz1kHz2kHz4kHz8kHzLw [dB(A)]63Hz125Hz250Hz500Hz1kHz2kHz4kHz8kHzLw [dB(A)]
100257786258525048454358433027313336333341
4113816561555351484861463330343639363844
6170846865585654525264493634373942404247
8226877168615857555667523937404145434651
10283917572656161596171564341444449475155
125288656157545350474558393127303130313338
4177706460575653505061443430333433343842
6265746864605956545465483834363736384245
8353777167636159575867514137393939414648
10442827571676463616371564541434243455153
1602145686560545557514562434240364548424152
4289716863575860544965464543394851454555
6434747167606163585268494847425154494858
8579787571646467625772535251465458535362
10723817874676670656175565554495661565765
2002226656154525358574663444439373947483752
4452686457555661605066474742404250514155
6678726861585965645569515146434554554659
8904767265626268675973555550474857585062
101130797568656471706376585853505060615465
2502353735655555458554462544141414147463551
4707786158585761584965594644444450494054
61060826562616065625369635048474754534458
81413867066656368655772675552515057564861
101766907469686571686175715955545260595264
3152561645956535659585064474543394348494153
41122686259565962615567514846424651524656
61682726663596265655970555250454954565060
82243767067636569696474595654495258605564
102804797370666772726877625957525461635967
3552712545758586061635368453943444448392951
41425636461606162655669533844474649433153
62137727068616262645770585547484850463455
82849767469626263645870615149484951483556
103561817769636364655971645452494951493656
4002904706560596468625171534951525864563666
41809736963626771655474565354556167593969
62713777366656974685877605757586370624372
83617817770687277716280646161616673654775
104522848173707479746582676564636875685077
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