Inexpensive yet rugged construction in a welded chamber control. The Series 291/293/294 Welded Chamber Level Control is specifically designed for single stage operation where pressure does not exceed 350 psig (24 bar) at 100°F (38°C) or 300 psig (21 bar) at 600°F (315°C) available with a variety of hermetically sealed snap switch or mercury switch circuits protected by a general purpose, weatherproof or explosion-proof enclosure and will accommodate specific gravities down to 0.60.
Made in USA. brand DWYER, model 291/293/294
International delivery to Europe, Asia and Africa.
Our warehouses are located in the UK, UAE and Senegal.
price by request
Available
Founded in 1931, DWYER manufactures equipment for measurement, conversion and control – pressure, temperature, level, flow.
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We take care of all logistics and customs clearance of I&C solutions from Europe, USA, China and India
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Our specialists are ready to advise you on any technical question. We can find an analogue of any device
PRODUCT APPLICATIONS
| EXAMPLE | 291 | WT | 7810 | C1 | 60 | 291-WT-7810-C1-60 Liquid Level Control, welded carbon steel chamber, weatherproof enclosure, SPDT snap switch, fixed deadband, automatic reset, operating pressure 350 psig (24 bar) at 100°F (38°C), 300 psig (21 bar) at 600°F (315400°C), side/bottom 1″ NPT, minimum specific gravity 0.60. | |
| CONNECTION | 291 | One Vertical and One Horizontal 1″ NPT | |||||
| 293 | One Vertical and One Horizontal Flanged Connection | ||||||
| 294 | Two Vertical Flanged Connections | ||||||
| ENCLOSURE | G | General Purpose, NEMA 1 | |||||
| WT | Weatherproof, NEMA 3R, 4, 4X | ||||||
| E | Explosion-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G | ||||||
| EV | Explosion-proof/Vapor-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G | ||||||
| CIRCUITS (for electrical circuits see charts A & B below) |
48XXBN | Single Stage Mercury Switch, see chart A | |||||
| 78XXBN | Single Stage, Snap Switch, see chart B | ||||||
| 98XXBN | Single Stage, High Capacity DC Snap Switch, see chart B | ||||||
| CHAMBER MATERIAL | C1 | Carbon Steel Body | |||||
| C216 | 316SS Body | ||||||
| MINIMUM SPECIFIC GRAVITY |
60 | 0.60 Specific Gravity (291 only) | |||||
| 160 | 0.60 Specific Gravity & 150# Flange (293, 294 only) | ||||||
| 360 | 0.60 Specific Gravity & 300# Flange (293, 294 only) | ||||||
| OPTIONS | H2 | H2 Socket Weld Hub (291, steel housing only) | |||||
| STW | SS Tag Wired | ||||||
| 01 | Breather Only (E-Housing only) | ||||||
| 02 | Drain Only (E-Housing only) | ||||||
| 12 | Breather & Drain (E-Housing only) | ||||||
| 23720 | Fungus Proofing |
CHARTS A & B – ELECTRICAL CIRCUITS AND RATINGS
| SWITCH TYPE |
SWITCH ACTION
|
ELECTRICAL RATINGS IN AMPS
|
ORDERING CODE
|
|||||
|
AC
|
DC
|
|||||||
|
120V
|
240V
|
440V
|
30V
|
125V
|
250V
|
|||
| CHART A Mercury Contacts |
SP-ST open on level FALL |
10
|
5
|
3†
|
10
|
5
|
-4821BN
|
|
| SP-ST open on level RISE |
10
|
5
|
3†
|
10
|
5
|
-4820BN
|
||
| SP-DT one switch |
4
|
2
|
1†
|
4
|
2
|
-4810BN
|
||
| SP-DT two switches E.I.* |
10
|
5
|
3†
|
10
|
5
|
-4815BN
|
||
| DP-ST two switches E.I.* open on level FALL |
10
|
5
|
3†
|
10
|
5
|
-4813BN
|
||
| DP-ST two switches E.I.* open on level RISE |
10
|
5
|
3†
|
10
|
5
|
-4814BN
|
||
| DP-DT two SP-DT switches |
4
|
2
|
1†
|
4
|
2
|
-4806BN
|
||
| CHART B snap action contacts |
SP-DT one switch |
12
|
5
|
3†
|
0.5**
|
0.25**
|
-7810BN
|
|
| DP-DT two SP-DT switches |
12
|
5
|
3†
|
0.5**
|
0.25**
|
-7806BN
|
||
| SP-DT one hermetically sealed switch |
5
|
5
|
5**
|
-7810HM
|
||||
| DP-DT two hermetically sealed SP-DT switches |
5
|
5
|
5**
|
-7806HM
|
||||
| DP-DT two SP-DT switches |
10
|
3
|
10‡
|
3‡
|
-9806BN
|
|||
| SP-DT one switch |
10
|
3
|
10‡
|
3‡
|
-9810BN
|
|||
You can request the necessary certificates, documentation, instructions and user manuals for DWYER 291/293/294 using the special form.
You can buy DWYER 291/293/294 in UK or Europe at a favourable price in «DOLCHETRADE» by leaving a request on the website, by phone +441225535040 or by email dolce@dolcetrade.com. DWYER 291/293/294 price are subject to change depending on exchange rates. We deliver instruments by transport companies in the United Kingdom and Europe.
See also: Level Switches
