Control valve with pneumatic actuator, uninsulated

Control valve with pneumatic actuator, insulated by Inzonex

02 / Equipment

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Control valve with pneumatic actuator216 Wbare9 Winsulated95.6 %less

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Inzonex Modular Insulation · Condensate line

Control valve with pneumatic actuator

The body runs at line temperature. The actuator above it has to stay cool. Drag the divider: the right-hand side is a fitted removable module on this exact geometry.

Energy cost saving / year€11060 €/MWh fuel

Heat retained / year1.7 MWhAt 8,000 operating hours

Emissions avoided / year0.37 t CO₂e201.6 kg CO₂e/MWh fuel

Modelled outer surface27.3 °CBelow the 45 °C design target

Estimate: 1 × 0.1434 m² · 110 °C bare surface · 8,000 operating hours/year.

€110energy cost saving / year1.7 MWhretained

For your operating conditions

Your savings

Change any input and every figure recomputes. The defaults describe the equipment modelled here.

#calculator .main-inputs{display:none}JavaScript is off. The results show the published default scenario, not a live calculation. Enable JavaScript to change inputs. The reference tables and explanations remain available below.

Service

Diaphragm actuator on a yoke over the valve body. The module stops at the bonnet, so the actuator, the travel indicator and the air line stay clear.

Bare surface temperature

°C

Metal surface temperature. It sits a few degrees under the fluid temperature, not at it.

Bare body area

m²

The default is a provisional reference area, not a measured area for this model. Automatic DN lookup is unavailable until construction and pressure class are confirmed. Enter the verified external hot area, including physical fasteners where present. Exclude cold actuators and avoid counting shared surfaces twice.

Number of control valves

Items of the same size and duty on this circuit.

Operating hours

h/yr

Hot standby counts: a standby unit full of hot water loses heat all year.

Insulation thickness

Lamella at λ 0.038 W/m·K. Past 50 mm each further layer returns less.

Ambient air

°C

Plant-room annual mean. The outdoor design temperature is a different figure.

Currency

The symbol on the price you enter and on the saving that comes back. No exchange rate is applied, so enter the fuel price in the currency you pick.

Fuel price

€/MWh

Delivered fuel, before boiler efficiency.

Insulation cost

€

Supply and fit for removable modules. Our default basis is 190 EUR/m² of covered surface. Replace it with your own quote in the currency you picked.

What this means

What it comes to.

At the modelled defaults, on this equipment.

Outer surface at 50 mm: 27.3 °CMeets the 45 °C design target
Bare metal at 110 °C: Above the 45 °C study targetContact risk depends on material and duration; no burn time is calculated
Simple payback: 3 monthsAt 190 EUR/m² supply and fit, saving €110 a year

Asked about control valve with pneumatic actuator

Questions.

Answers distinguish modelled heat-loss estimates from equipment selection and service guidance.

How much heat does control valve with pneumatic actuator lose on a condensate line?

Modelled here: 1 × 0.1434 m² at 110 °C lose 216 W bare, and 9 W with 50 mm of removable insulation. That is 95.6 per cent less.

Where does the area come from?

Is it safe to touch once insulated?

The module settles at 27.3 °C on these defaults, under our 45 °C touch-safe target. We set that target against the burn thresholds in EN ISO 13732-1.

What the numbers mean

How the figure is produced.

Steady-state estimate using convection, radiation and an insulation energy balance. Equivalence to a surveyed equipment model has not been established.

Shape: Horizontal cylinder, characteristic length 0.120 m
Convection: Churchill–Chu on air properties at film temperature
Radiation: Stefan–Boltzmann at emissivity 0.85
Bare-case allowance: ×1.20, assumed class multiplier; not an inventory of actual thermal bridges
Insulated case: Outer-surface energy balance, without temperature clamping. 45 °C is a design target; plus an assumed 5% heat-loss allowance for seams. The exterior uses a 0.3 m vertical-plate approximation; conductivity is constant.

The rest of the line

Other equipment

/ 01Condensate heat exchanger1 × 1.64 m² at 110 °C · 2.2 kW bare → 108 W covered · 95.1 % lessGasketed plate exchangerOpen the model / 03Float steam traps1 × 0.1434 m² at 110 °C · 224 W bare → 9 W covered · 95.8 % lessFloat trap, bolted coverOpen the model / 04Ball valves4 × 0.1434 m² at 110 °C · 866 W bare → 38 W covered · 95.6 % lessThree-piece body, leverOpen the model / 05Y-strainers2 × 0.1434 m² at 110 °C · 448 W bare → 19 W covered · 95.8 % lessY-pattern, blowdown capOpen the model

Area and temperature scenarios

Area at each service temperature.

Bare surface loss per item. Nothing here is interpolated — each cell is a separate solution of the same balance, at 20 °C ambient.

Reference scenario	Area m²	100 °C	110 °C	125 °C	140 °C	Insulated 110 °C	Cut
Area scenario 1Not a product size	0.1115	144 W	168 W	207 W	250 W	7 W	95.6 %
Area scenario 2Not a product size	0.1249	161 W	189 W	232 W	280 W	8 W	95.6 %
Area scenario 3Not a product size	0.1434	185 W	216 W	267 W	321 W	9 W	95.6 %
Area scenario 4Not a product size	0.1709	221 W	258 W	318 W	383 W	11 W	95.6 %
Area scenario 5Not a product size	0.1921	248 W	290 W	357 W	430 W	13 W	95.6 %
Area scenario 6Not a product size	0.2388	308 W	361 W	444 W	535 W	16 W	95.6 %
Area scenario 7Not a product size	0.2954	381 W	446 W	550 W	661 W	19 W	95.6 %
Area scenario 8Not a product size	0.3769	487 W	569 W	701 W	844 W	25 W	95.6 %
Area scenario 9Not a product size	0.5315	686 W	802 W	989 W	1.2 kW	35 W	95.6 %
Area scenario 10Not a product size	0.7160	925 W	1.1 kW	1.3 kW	1.6 kW	47 W	95.6 %
Area scenario 11Not a product size	0.9595	1.2 kW	1.4 kW	1.8 kW	2.1 kW	63 W	95.6 %
Area scenario 12Not a product size	1.49	1.9 kW	2.2 kW	2.8 kW	3.3 kW	98 W	95.6 %

Illustrative areas, not verified DN-to-area mappings for this equipment. Replace the input with measured external geometry for a project calculation. Physical bolt, nut, flange and stem coverage must be checked separately.

Insulated column: 50 mm lamella at λ 0.038 W/m·K. Outer surface calculated without clamping. Our 45 °C design target is checked against the burn thresholds in EN ISO 13732-1

Control-valve actuator access