Delta Mobrey 772 Series Temperature SwitchIndonesia Industrial Parts

Description

Delta Mobrey 772 Series Temperature SwitchPressure Temperature Switch has a flexible thermal system and is suitable for setpoints between -50°C and 150°C with maximum working temperatures up to 250°C.

Designed in the mid-1970s and developed over subsequent years, the Performance Series switch range offers users the broadest range of options, the highest levels of set-point repeatability and the confidence of long term performance that a mature product such as this can prove.

The model 77 Performance Series Vapour Pressure Temperature Switches comprise an armoured capillary attached to the sensing bulb via a semi-rigid extension on which a compression gland slides to enable various depths of thermowell (pocket) to be accomodated. This sensor is coupled to the microswitch via a precision stainless steel mechanism, the combination of which helps deliver the market leading performance customers can expect from the Series.

Delta Mobrey 772 Series Features:

Precision stainless steel mechanism for arduous atmospheres and high humidity.
Set point adjustable over whole range against calibrated scale with tamperproof adjuster.
Weatherproof and Flameproof models ATEX and IECEx
Hermetically sealed microswitch option
Models for fixed switching differential, adjustable differential and HI-LO operation.
Ranges available up to 230 to 300°C (450 to 580°F).
Maximum working temperature up to 310°C (600°F).

Application:

The 772 Performance Series is suitable for a wide range of applications in:

Oil & Gas
Chemical
Petrochemical
Refining
Power
Food Industry

The choice of models available ensures that the 772 Performance Series is suitable for use in:

Corrosive atmospheres
Resistant to chemical attack

Delta Mobrey 772 Series Specification:

Accuracy:
- Set point repeatability ± 0.5% of span at 20°C / 68°F ambient.
- Scale accuracy ± 2% of full scale.
- For models 721-3, 781 scale accuracy will be effected by relative position of head and sensing bulb i.e., sensing bulb 1 metre above/below head = set point shift ± 1% of full scale approx.
Storage Temperature: -25 to +60°C / -13 to +140°F
Ambient Temperature:
- -25 to +60°C / -13 to +140°F
- Models 771-4. A 10°C (18°F) rise in ambient temperature will on average result in a 1°C (1.8°F) fall in set point. On models 721-3, 781 it is advisable to avoid the condition where the ambient temperature is within ± 5°C (± 9°F) of the set point. Under this condition the liquid/vapour phase becomes less well defined and the switching differential increases. Where this condition is unavoidable refer to Models 740/760 Liquid Expansion Temperature Switches or 771-4.
Maximum Working Pressure: System sensing probes for both the capillary and rigid stem version are designed to withstand 100 bar (1500psi) without thermowell.
Enclosure classification: IP66 / NEMA 4X / Flameproof Ex d
Switch output:
- SPDT or DPDT snap action microswitch (standard)
- Hermetically sealed (optional)
Process Connection: 3/8 NPT External Sliding Gland, ½ NPT External Direct mounting.
Approximate Weight:
- Enclosures: “W & N” 2.5kg / 5.5lb (models 731-4 2.2kg/4.8lb); “A & O”
- 3.5kg /7.7lb (models 731-4 3.2kg/7.0lb); “H” 4.0kg/8.8lb; “K” 8.7kg/19.1lb