Orifice DP Flow with Micro Switch DDW-DS31

The DDW-DS31 flow monitor is used for monitoring the flow of water, oils, and neutral liquids.
The DS31 flow monitor contains a rugged and uncomplicated diaphragm system. The differential pressure generates a unilateral force at the membrane which moves the diaphragm system against the measuring range springs. The resulting displacement activates a micro switch. The user sets the switch locally by a hand wheel in the range of 30 – 100% of the flow span.

download pdf datasheet

0 People watching this product now!

SKU: DDW-DS31 Categories: Differential Pressure Flowmeter, Flow, Orifice

Description
About Kirchner & Tochter

Description

The DDM-EM measuring orifice measures and monitors the flow of gases and liquids.

The device works according to the principle of differential pressure. A differential pressure exists on the orifice, which is proportional to the square of the volume flow through the pipeline. The user mounts the orifice between flanges or with Rp pipe unions into the conduit. The unimpeded, straight tube length has to be 6 DN before and 4 DN behind the mounting position.

A tough and insensitive sensing diaphragm is embedded in the EM-transmitter housing. By the differential pressure a spring force occurs at the measuring diaphragm. The resulting displacement is transmitted to the core of an inductive displacement transducer via an axial rod. The built-in electronics evaluates this deflection and transforms them into direct display, limit value switches and output signal.

installation between flanges as per DIN EN 1092-1, internal and external threads as per DIN EN ISO 228 or with pipe union as per ISO 7-1
horizontal or vertical installation
suitable for liquids and gases
no moving parts, wear-free
standard measurement range or calibration according to customer specifications
4 – 20 mA / 0 – 10 V output
digital LED display in m3/h
optionally
- wall attachment installation
- limit value switches
- other display units

Operating Principle

blenden min en

A differential pressure arises at a pipe constriction, which is proportional to the square of the flow rate through the pipe.

The resulting differential pressure can be recorded with a meter and can be directly indicated as flow rate on a scale.

About Kirchner & Tochter

The know-how of Kirchner specialists competence, experience and years of expertise (since 1951) are the foundations of the Kirchner success story.

Kirchner has specialized in the production of mechanical flow measurement and monitoring, VA, Flapper type and DP flow meters, in particular for applications in the water/wastewater/slurries, chemical industries and in furnace and system design.

Wide range of products
Specialized product how know with years of experience and expertise
Customized solutions
Certified quality Management, (PED, IECEx/ATEX, VDS)
Short and reliable delivery cycles

Variable area flow meters

Variable area flow meters with glass cone are used in all industries, because they represent a very cost-effective and reliable method.
Appliances with metal measuring tube (SGM) is the optimal solution at high temperatures and pressures. Because of the extensive electronic modules they are predestined in the processing plants of the chemical industry.
Devices with plastic cone (SKT / SKP / SKPVC) are the most cost-effective method for flow measurement.

Short-tube flow meters

Short-tube variable area flow meters are suitable for the measurement of small and low flow rates and are available in different types, e.g. with valve and limit switches.

Flap-type flow meters

Reliable measuring devices even for large flow rates in numerous versions with limit switches and electronically measured value transducers. The devices are used in water treatment plants, power stations, to monitor cooling processes, and in building technology and swimming pools.

Differential pressure flow meters

These devices are manufactured with a wide variety of nominal widths. Units with small nominal widths such as DDM / DDW are applied in cooling circuits and monitoring of liquids. The sprinkler orifice plate SMB is installed in stationary sprinkler systems and has been approved by the VdS damage prevention.

Electrical accessory equipment

Accessory products to evaluate the data of the flow meters in control systems, PLC, process automation and in process data recording systems.

Sight glasses

The devices in the sight glass series are used for the visual display of liquid media. The sight glass consists of a sight glass tube of borosilicate glass, four spacers and two connector flanges. Due to its simple design, the service is maintenance-free. Thanks to external radial seals, there are no changes in cross-section and thus no pressure loss.

The media that can be used include for example water, oil and alkaline or acidic liquids. By selecting the material appropriately, the sight glass can be also be used with aggressive media.

Level Indicators

The devices of the NA and NA-V4A model series operate according to the principle of buoyancy. They are designed for vertical installation only.

Consisting of display, flange, float tube and float the NA serves as a level indicator for e.g. underfloor installation liquid container.
The level indicator NA-V4A, consisting of a stainless steel sleeve, a float tube made of borosilicate glass and the connection heads, is mounted outside of the tank.

Each device contains a measuring tube made of borosilicate glass and is custom-made with the desired connection geometry.

With the installation of electrical limit value switches that are adjustable over the entire measuring range, the devices can also be used for remote monitoring.

Bypass flow meters

The wide choice of materials that can be used to manufacture our DST bypass flow meters allows flow measurement of the most varied fluids.

The low-cost device in PVC is frequently used in swimming-pool water technology. The device in PVDF is suitable for the flow measurement of aggressive media, e.g. in water treatment, while the DST-1/2 is mainly used for flow measurement of air and gases. The measuring range extends from 0.02 - 0.16 m³/h to 300 - 1800 m³/h for H₂0, and from 0.15 m³/h - 1.5 to 1200 - 6000 m³/h for air at STP.

The DST bypass flow meter operates on the differential-pressure method. A ring with an orifice plate is installed in the pipeline. The orifice plate causes constriction of the flow and effects a drop in pressure. This pressure drop is proportional to the square of the flow rate.

If the pressure tap upstream of the orifice plate is connected by a pipe to that downstream of the orifice plate, a partial flow will flow through that pipe. This partial flow is proportional to the flow rate in the main pipeline.

The partial flow can be turned on and off, as required, by installing two ball valves in the bypass line.

Stay informed

Learn more about us today

Have a question?

Explore Our Services

Industry Articles