# kv-instellingen

## English translation: kv values

GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
 Dutch term or phrase: kv-instellingen English translation: kv values Entered by:

 23:36 May 6, 2015
Dutch to English translations [PRO]
Tech/Engineering - Engineering (general)
 Dutch term or phrase: kv-instellingen van een radiator
 Emma RaultUnited Kingdom Local time: 15:50
Selected response from:

Michael Beijer
United Kingdom
Local time: 15:50
 A belated thank you!4 KudoZ points were awarded for this answer

4kv values
 Michael Beijer

Discussion entries: 5

13 mins   confidence:
kv values

Explanation:
Refs will follow.

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Note added at 15 mins (2015-05-06 23:51:30 GMT)
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see:

"The kv value expresses the amount of flow in a regulating valve at a given valve position with a pressure loss of 1 bar. The special situation with a fully open valve determines the kvs value.

The Kv value expresses the amount of flow in a regulating valve at a given valve position with a pressure loss of 1 bar. The special situation with a fully open valve determines the kvs value.

The amount of flow at a lower pressure loss can be calculated using the formula:

kv = Q / √ΔP

where

kv: kv value[m³/h]
Q: Flow [m³/h]
ΔP: Pressure loss over regulating valve [bar]" (http://uk.grundfos.com/service-support/encyclopedia-search/k... )

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Note added at 18 mins (2015-05-06 23:54:37 GMT)
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also written as: "kv value" (with the "v" in subscript), as in here: http://fheprod.danfoss.com/PCMPDF/VDTVP402_IBV_013G1382_83_t...

"The kv-values indicate the flow volume (Q) in m³/h at a pressure loss (∆p) across the valve of 1 bar; . At setting N, the kv-value in accordance with EN 215 can be stated as Xp = 2 K. At lower preset values, Xp will be reduced until approximately Xp 0.5 at presetting 1. The table shows the average measured values for integrated valves with radiator. The kvs-values indicate the valve capacity, when the valve is fully open"

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Note added at 20 mins (2015-05-06 23:56:59 GMT)
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"Kv-waarde; geleidingsvermogen van een klep, kraan of afsluiter." (https://nl.wikipedia.org/wiki/KV ) [links to:]

https://nl.wikipedia.org/wiki/Regelklep

"Kv-waarde
Het geleidingsvermogen van een klep (het tegenovergestelde van de weerstand) wordt aangegeven door de Kv-waarde (in Angelsaksische landen vaker de Cv-waarde). De Kv-waarde wordt aangegeven als de hoeveelheid doorgestroomd medium (vloeistof, gas) per tijdseenheid bij een eenheid van drukverschil over de klep. Meestal in m³/uur, of liter per minuut, bij een drukverschil van 1 bar. Die waarde varieert met het openingspercentage van de klep. De doorgelaten hoeveelheid (bij een bepaalde klepstand) is evenredig met de wortel uit het drukverschil."

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Note added at 22 mins (2015-05-06 23:58:43 GMT)
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"Thermostat valve V2000 with VS insert
For standard two-pipe heating circuit systems
For normal and average water quantities
Infinitely variable water quantity (4–130 kg/h)
Regulation via valve cone member limiting
Integrated flushing position
Kv (cv) value: 0.72

[…]

Thermostat valve V2000 with FV insert
For standard two-pipe heating circuit systems
For district heating circuit systems (solid metal version)
For normal and average water quantities
Infinitely variable water quantity (0 – 90 kg/h)
Regulation via valve cone member limiting
Zero shut-off possible
Kv (cv) value: 0.35" (http://www.hydronic-balancing.info/radiator-balancing-60.htm... )

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Note added at 22 mins (2015-05-06 23:59:00 GMT)
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or: "cv values"

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Note added at 27 mins (2015-05-07 00:03:22 GMT)
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"Supplied with integrated adjustable valve (without a thermostatic valve), with Kv value pre-set according to the heat output, CEN certified and tested in accordance with EN215.

[…]

A more PRACTICALLY ORIENTED SOLUTION is to fit the radiators with a Kv pre-set valve in the factory. The principle is relatively simple: the valve ensures that at a given pressure difference the correct quantity of hot water or mass flow passes through the radiator."

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Note added at 36 mins (2015-05-07 00:12:51 GMT)
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or: "kv-settings"

see e.g.:

"The kv-value indicates the water flow (Q) in m³/h at a pressure drop (Δp) across the valve of 1 bar; kv = Q: √Δp.

At setting N the kv-value is stated according to EN 215, at XP = 2K i.e. the valve is closed at 2˚C higher room temperature.At lower settings the XP value is reduced to 0.5K of the setting value 1.

The kvs-value states the flow Q at a maximum lift, i.e. at fully open valve at setting N.

[…]

The table shows the reduced flow in m3/h when applying different kv-settings:

[…]"

(http://heating.danfoss.com/PCMPDF/VDUVV302_Xtra-Collection.p... )

 Michael BeijerUnited KingdomLocal time: 15:50Works in fieldNative speaker of: EnglishPRO pts in category: 28
 A belated thank you!

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