EWT Water Technology – Water Treatment

EWT Water Technology


Sample Cooler

HomeProductsSample CoolerSummaryDesign ExampleApplicationsTechnical DataDownloads

Summary:

A sample cooler serves for safe sampling, cooling and if applicable condensation of hot fluids. The following descriptions are limited to water to water heat exchangers used in steam boiler plants and hot water boiler plants for the above purposes.

A sample cooler consists of a pressure vessel containing a pipe coil. The sample medium, for example boiler feed water, flows through the inside of the pipe coil, while the cooling medium, usually water, flows around the outside of the pipe coil. This results in heat being transferred from the sample medium to the cooling medium.

Installed into a complete →steam and water analysis system, sample coolers are used for both continuous sampling with fully automated on-line analysis, and for manual grab sampling with manual analysis. Available accessories include isolating valves, throttling valves, pressure relief valves, solenoid valves for high temperature shut-off, local and remote temperature indicators, local and remote flow indicators, cation exchangers, and any instrumentation for on-line water analysis.

top of page

Design Example:

sample cooler

Sample coolers for manual grab sampling, different types. From left to right: Type 080-250 C and 0850-500 C, both compact design with integrated discharge funnel. Type 125-300 H, 125-400 H, and 125-600 H, each high-performance design with removable pipe coil.

top of page

Applications:

top of page

Technical Data:

type 080-250 C 080-500 C 125-300 H 125-400 H 125-600 H
design compact cooler high performance cooler
state of matter sample medium liquid steam, MP/ HP
mass flow sample medium ≤ 20 kg/h ≤ 40 kg/h ≤ 60 kg/h
heat transfer, approx. 1 ... 3 kW 2 ... 6 kW 5 ... 20 kW 15 ... 35 kW 25 ... 55 kW
allowable pressure, max. pipe coil 16 bar 40 bar 160 bar
shell 10 bar
allowable temperature, max. pipe coil 200 °C 250 °C 350 °C 550 °C
shell 110 °C
volume pipe coil 0.1 L 0.2 L 0.3 L 0.4 L 0.5 L
shell 1.5 L 3 L 5 L 6 L 9 L
Pressure Equipment Directive (PED) Directive 2014/68/EU, article 4, section 3. Sound engineering practice. The pressure equipment must not bear the CE-marking.
connections inlet sample medium tube fitting do=8 mm butt weld end do=14 mm
outlet sample medium pipe do=8 mm
inlet cooling medium threaded, female Rp 1/2" threaded, female Rp 3/4"
outlet cooling medium threaded, male R 3/4"
drain threaded, female Rp 1/4"
material pipe coil stainless steel 1.4571 stainless steel 1.4404
shell stainless steel 1.4541
flange, cover stainless steel 1.4571
gasket NBR composite
stop valve sample medium stainless steel 1.4571
throttling valve sample medium stainless steel 1.4571
stop valve cooling medium stainless steel 1.4408
empty mass, approx. 3.6 kg 6.3 kg 8.4 kg 12 kg 15 kg
allowable cooling water quality turbidity < 10 NTU
total suspended solids (TSS) < 10 mg/L
pH ≥ 6
water hardness (¹) ≤ 0.1 ... 2.5 mmol/L ≈ 10 ... 250 ppm as CaCO3
chloride (¹) < 10 ... 200 mg/L
iron < 0.2 mg/L
¹ Depending on, among other things, sample inlet temperature and cooling water outlet temperature; see PDFdata sheet. Natural waters will often not conform to these limit values. In case of sample inlet temperature ≥ 300 °C or cooling water outlet temperature > 50 °C, we recommend using →demineralized water for cooling.

top of page

Downloads:

further downloads

top of page


2018-05-13 • water treatment made in GermanyCompany InformationPrivacy