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Pressure Control Liquid Level Control Temperature Control Glycol Pump Control Valves.

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Presentation on theme: "Pressure Control Liquid Level Control Temperature Control Glycol Pump Control Valves."— Presentation transcript:

1 Pressure Control Liquid Level Control Temperature Control Glycol Pump Control Valves

2 Temperature Controllers

3 Indirect Thermostat T12 Negative feedback for linear output 5 to 30 psi air or gas supply pressure Stainless steel housing Bi-metal sensing element for accurate control Output pressure proportionate to temperature at any setting Single adjustment over Wide temperature range: T to 400 o F HT to 700 o F

4 ? Direct or Indirect ? Direct Mode Indirect Mode Rising Temperature Rising Output Falling Output DirectIndirect

5 Indirect Thermostat Indirect

6 Thermostat with Separable Socket Maximum Working Pressure Without Separable Socket 500 psi With Separable Socket 4000 psi With Special Separable Socket 7000 psi

7 Direct Acting Thermostat T 12DA Supply Output Direct

8 T 12DA Thermostat Output Supply Indirect Reversed for Indirect Throttle Mode

9 High Temperature Thermostat HT 12 Output Supply Indirect

10 Direct Snap Thermostat T 12S Output Supply Direct

11 Indirect Snap Thermostat T 12DAS Output Supply Indirect

12 Indirect Throttle Thermostat T 12T Output Supply Indirect

13 Direct Throttle Thermostat T 12TDA Output Supply Direct

14 Direct Semi-Throttle Thermostat T 12DAT Output Supply Direct

15 Indirect High Temperature Shut-Down T 12M Output Supply Indirect

16 Direct Low Temperature Shut-Down T 12DAM Output Supply Direct

17 High Temperature Pilot Guard HT 12PG Output Supply Direct

18 Typical Installation High temperature shutdown thermostat Burner control thermostat Safety shutdown valve Burner valve Main burner Pilot Pilot Guard thermostat Instrument Gas

19 High temperature shutdown thermostat Burner control thermostat Safety shutdown valve Burner valve Main burner Pilot Pilot Guard thermostat Instrument Gas Low liquid shutdown pilot Typical Burner Control Installation

20 Trouble Shooting SYMPTOM CAUSE Erratic temperature changes Continuous venting Bent sensing element (element should be centered in base and should “ring”) Incomplete immersion of probe Dirty pilot plug seat Hole in diaphragm Weak pilot plug spring Faulty ‘O’ ring

21 Trouble Shooting To check small seat: increase temperature setting several degrees and see if venting stops. To check large seat: decrease temperature setting several degrees and see if venting stops. Replace pilot plug and seats if unable to stop venting by cleaning seats.


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