WIKA · Pressure measurement · Family DMS
Diaphragm monitoring system with threaded connection
For the chemical and petrochemical industries
Range
-1…40 bar
Output
Reed switch
Protection
IP65
EN 10204 2.2NACE MR 1705NACE MR 103EN 10204 3.1
Price
On request
Depends on configuration
Description
The WIKA combination of diaphragm seal, pressure measuring instrument and monitoring element is ideally suited for the harshest measuring tasks. The system can withstand aggressive, contaminated or hot media and ensures a secure connection between the medium and the diaphragm monitoring system.
The patented diaphragm monitoring has been designed specifically for the highest safety requirements in the chemical and petrochemical industries.
On the double-diaphragm system a second, internal diaphragm in the pressure measuring instrument ensures the reliable separation of the environment and the process in the event of a diaphragm rupture. The measuring function of the overall system remains unrestricted, nevertheless it must be replaced immediately.
Special features
- Double-diaphragm system to ensure the separation of the process and the pressure measuring instrument
- Process connection with thread to provide for direct threaded connection
- All welded version with internal diaphragm
- System from Monel
Identification
| Model | DMS34 |
| Product family | DMS |
| Subcategory | Diaphragm monitoring system |
Measuring range
| Pressure ranges | 0…2.5 bar · 0…4 bar · 0…6 bar · 0…10 bar · 0…16 bar · 0…25 bar · 0…40 bar · -1…1.6 bar · -1…3 bar · -1…5 bar · -1…10 bar · -1…15 bar · -1…25 bar |
Process conditions
| Process connection | 1/2 NPT male1/2 NPTDN72 PN40 |
| Process temperature | +10…+150 °C |
Electrical characteristics
| Output signal | Reed switch · Reed switch, 150 V, 0.5 A |
| Electrical connection | Cable bushing with 2 m cable |
| Switching function | Switch point set to -0.2 bar rel. and rising pressure |
| Switching contacts | 1 |
Materials
| Case material | Monel 400, Stainless steel, Stainless steel 316L |
| Wetted parts material | Monel 400 2.4360; UNS 04400, Monel 400 |
Operating environment
| Ambient temperature | +10…+40 °C |
| IP rating | IP65 |
Certifications and approvals
| Certifications | EN 10204 2.2NACE MR 1705NACE MR 103EN 10204 3.1 |
Additional details
| Dial size | 63 mm |
| Datasheet languages | EN |
Tables from datasheet
Diaphragm seal system
| Version | Pressure measuring instrument welded to diaphragm seal |
|---|---|
| Scale range | |
| Gauge pressure | 0 ... 2.5 bar (0 ... 40 psi) 0 ... 4 bar (0 ... 60 psi) 0 ... 6 bar (0 ... 1.000 psi) 0 ...10 bar (0 ...150 psi) 0 ... 16 bar (0 ... 250 psi) 0 ... 25 bar (0 ... 400 psi) 0 ... 40 bar (0 ... 600 psi) |
| Vacuum 1) | -1 ... +1.6 bar (-30 inHg ...+25 psi) -1 ...+3 bar (-30 inHg ...+45 psi) -1 ...+5 bar (-30 inHg ...+70 psi) -1 ...+10 bar (-30 inHg ...+145 psi) -1 ...+15 bar (-30 inHg ...+220 psi) -1 ...+25 bar (-30 inHg ...+360 psi) |
| Permissible temperature range Medium Ambient Storage | 10 ... 150 °C (50 ... 302 °F) 10 ... 40 °C (50 ... 104 °F) 10 ... 60 °C (50 ... 140 °F) |
| Ingress protection per IEC/EN 60529 | IP65 |
| Material 2) wetted | Diaphragm: Monel 400 2.4360;UNS 04400 Diaphragm seal: Monel 400 2.4360;UNS 04400 |
| Mounting type | Direct mounting |
| Level of cleanliness of wetted parts | Oil and grease free per ASTM G93-03 level FWIKA standard (< 1,000 mg/m ² ) |
| System fill fluid | KN 21 halocarbon |
| Monitoring element 3) | Switch contact and dial with red/green areas (contact pressure gauge, model PGS23.063) Dial with pressure gauge, | red/green areas (Bourdon tube model 232.30.063) | |
|---|---|---|---|
| Dial display | Pointer in green range Pointer in red range | →Outer diaphragm intact →Outer diaphragm defective | |
| Nominal size | 63 (2.5") | ||
| Material Case Pressure element Movement Bayonet ring Pointer/dial Window | Stainless steel, with solid baffle wall (Solidfront) and blow-out Monel 400 2.4360;UNS 04400 Stainless steel Stainless steel Aluminium Laminated safety glass | back | |
| Switch behaviour | Switch point set to -0.2 bar rel. and rising pressure Switch point not reached →Outer diaphragm intact Switch point reached →Outer diaphragm defective | Without | |
| Switch contact | Reed switch model 851 No control unit and no power supply required Direct switching up to 150 V, 0.5 A Also suitable for direct triggering of a programmable logic controller (PLC) | Without | |
| Electrical connection | Cable bushing with 2 mcable (optional connectors available on request) | Without | |
| Ingress protection per IEC/EN 60529 | IP65 | IP54 |
Pressure measuring instrument: Bourdon tube pressure gauge model 262.50.100
| Nominal size | 100 mm(4.0") |
|---|---|
| Pressure limitation | Steady: 3/4 x full scale Fluctuating: 2/3 x full scale Short time: Full scale value |
| Material | |
| Case/bayonet ring Pressure element Movement Dial Adjustable pointer Window | Stainless steel 316L Monel 400 Stainless steel 316L Aluminium, white, black Aluminium, black Laminated safety glass |
| lettering | |
| Ingress protection per IEC/EN 60529 | IP65 |
Industry
Oil & Gas
Chemical/petrochemical industry, oil/gas industries · Pressure/vacuum measurement on pipelines or vessels
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