Kobold DWN Paddle Bellows Flow Monitor

Kobold DWN Paddle Bellows Flow Monitor DWN works according to the diaphragm plate principle. Baffle/paddle (1) is reflected in the flow direction against the force of the spring (2) by the flowing medium. A stainless steel bellow (3) seals off the system hermetically between medium and measuring unit/indicator. The motion is transferred positively from the baffle

(1) to the measuring section. In the measuring section, a microswitch (6) and a pilot lamp (7) are operated as soon as the set switching point is exceeded or undershot. Thus the change in flow is clearly signaled locally by the switching point pilot lamp (illuminates for undershooting). At the same time, switching operations are triggered by the microswitch, designed as a 3-pole changeover contact.

The displacement-deflection technique is one of the most secure systems available as motion is transferred positively from the baffle plate to the measuring section. With these flow monitors, if the T piece becomes clogged up with lime, foreign objects, or dirt, the system responds with “no flow”. It is practically impossible for the system to hang up in a position that indicates flow when there is in fact no flow.

Kobold DWN Paddle Bellows Flow Monitor Areas of Application

Heavy goods industry
Rolling mills and mill trains
Chemicals and pharmaceuticals industries
Drinks and semi-luxury food industry
General mechanical engineering and capital equipment
Measurement and monitoring of product, cooling, and lubricant circuits

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Specifications

	Material combination	Material combination	Material combination
Material combination	5	6	7
T piece	Brass	Stainl. steel	PVC
Connecting thread	Brass	Stainl. steel	PVC
Connecting flange	Steel zincplated	Stainl. steel	PVC
Weld-on flange	Steel sprayed S	Stainl. steel	Boring pipe box PVC
Paddle system	Brass	Stainl. steel	Stainl. steel
Bellows	Stainl. steel	Stainl. steel	Stainl. steel
Seals	FPM	FPM	FPM
Case meas. section	Stainl. steel	Stainl. steel	Stainl. steel
Covering hood	Polycarbonate	Polycarbonate	Polycarbonate
t_max*	100°C	100°C	20°C (60°C)
p_max*	16 bar	16 bar	16 bar (2 bar