Kobold All Metal Flow Switches DSS

For Liquids

The flow switches model DSS operate on the suspended float principle, however not with a tapering measuring tube, but with a cylindrical float and a slotted conical nozzle. This technology allows a very much more compact construction and offers considerable price advantages.

Switching range: 0.05 – 1.0 … 10 – 110 l/min water
Connection: G ¼ … G 1¼, ¼ … 1¼” NPT  female thread
Material: brass, stainless steel
p_max: 250 bar (brass), 350 bar (stainless steel)
t_max: 100°C
Accuracy: ±5 % of full scale

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Application in hazardous areas

Mechanics: The apparatus can be used as follows in explosive atmospheres in accordance with the applicable erection regulations on machines, devices and plants, such as e.g. EN 1127-1, EN 60079-14 etc.:

• In Zone 1 (gas hazard, category 2G) in the explosion groups IIA, IIB and IIC
• In Zone 2 (gas hazard, category 3G) in the explosion groups IIA, IIB and IIC
• In Zone 21 (dust hazard, category 2D) in the explosion groups IIIA and IIIB
• In Zone 22 (dust hazard, category 3D) in the explosion groups IIIA and IIIB

Specifications

Technical Details

• Housing:
  DSS-11…: brass, Ms 58
  DSS-12…: stainless steel, 1.4301
• Connections:
  DSS-11…: brass, Ms 58
  DSS-12…: stainless steel, 1.4301
• Float:
  DSS-11…: brass, Ms 58
  DSS-1101: PP
  DSS-12…: stainless steel, 1.4301
  DSS-1201: PVDF
• Nozzle:
  DSS-11…: brass, Ms 58
  DSS-12…: stainless steel, 1.3955
• Seals:
  DSS-11…: NBR
  DSS-12…: FPM
• Max. temperature: 100°C
  DSS-1101… / DSS-1201..: 70°C
• Max. pressure:
  DSS-1101… / DSS-1201..: 16 bar
  DSS-11…: 250 bar
  DSS-12…: 350 bar
• Installation position: vertical, upward flow
• Accuracy: ±5% of full scale
• Repeatability: ≤1%
• Contact: bistable reed contact
• Electr. connection:
  2 m cable (DSS-…F0…)
  for all other models : connector DIN EN 175301-803
• Electrical switching values:
  N/O contact
  max. 250VAC/DC /1.5A/100W/100VA
  changeover contact
  max. 250VAC/DC /1A/30W/60VA
  N/O contact and
  changeover contact (cCSAus)
  max. 230VDC /0.26A/60W,
  60VDC /1A/60W,
  max. 240VAC /0.42A/100W,
  100VAC /1A/100W
• Protection: IP65

Electrical contacts

• ATEX contact …F0:
  II 2 G Ex mb IIC T6 Gb
  II 2 D Ex mb IIC T80°C Db
  max. 250 VAC/1,5 A/100 VA
  IECEx BVS 07.0007X
• ATEX N/O contact type 41R57 …G0 and GG:
  II 3 G Ex ic IIC T4 Gc
  II 3 D Ex ic IIIC T125°C Dc
  -20°C ≤Ta ≤80°C
  max. 250 VAC/DC/1,5 A/100 W/100 VA
• ATEX changeover contact type 41R57U …H0 and HH:
  II 3 G Ex ic IIC T4 Gc
  II 3 D Ex ic IIIC T125°C Dc
  -20°C ≤Ta ≤80°C
  max. 250 VAC/DC/1 A/30 W/60 VA
  Hysteresis: approx. 3.5 mm float movement
  Protection: IP 65 electr. contacts

Download Datasheet: Kobold All Metal Flow Switches DSS

Reference : kobold.com