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DWYER 301

Photo DWYER 301 Description DWYER 301 Specifications DWYER 301 Model Chart DWYER 301 User Manual for DWYER 301 Related instruments to DWYER 301

DWYER 301 top mount float type level control

DWYER 301 top mount float type level control

The reliable 301 Series has proven to be a rugged economical choice for top mounting on tanks where side mounting is not practical, or for use in sumps. These units feature a fixed deadband for high or low alarm or shutdown. This control can be mounted on top of any closed or open tank or sump by use of the 3/4″ NPT connection. Flanges are also available in various sizes, pressure rating and material to meet any installation. Several size floats are available to accommodate liquids to a specific gravity of 0.5 and depths to 12 feet.

			

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Made in USA. brand DWYER, model 301

International delivery to Europe, Asia and Africa.
Our warehouses are located in the UK, UAE and Senegal.

price by request

Available

Available

Founded in 1931, DWYER manufactures equipment for measurement, conversion and control – pressure, temperature, level, flow.

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Only the best I&C brands

Our company is a global supplier of control and measuring instruments from well-known world brands

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Discounts for organisations

We sell high-tech equipment at very low prices. We provide really advantageous conditions for partners

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Fast delivery across the Europe & Asia

We take care of all logistics and customs clearance of I&C solutions from Europe, USA, China and India

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Professional advice on device selection

Our specialists are ready to advise you on any technical question. We can find an analogue of any device

Description of DWYER 301

Electrical switch actions, SPST, SPDT, DPDT, or DPST, can be ordered to satisfy most applications. Two-stage operation available, consult factory. Hermetically sealed snap action or mercury contacts provide for high or low current or voltage requirements. Enclosures include general purpose NEMA 1, weatherproof NEMA 4, explosion-proof NEMA 7, 9. The explosion-proof, vapor proof version combines weatherproof, vapor proof, and explosion-proof NEMA 4, 7, 9 construction in one enclosure. The 301 Series can be used on pressurized vessels.

PRODUCT APPLICATIONS

  • Oil Refineries
  • Chemical Plants
  • Power Generating Stations
  • Pumping Stations
  • Sanitary/Waste Water Facilities
  • Sumps
  • Open or Closed Tanks and Vessels

Technical specifications of DWYER 301

  • Minimum Specific Gravity: Dependent on float size and rod length. See Dimensional Drawing.
  • Temperature Limits: Ambient Temperature: 212°F (100°C); Process Temperature: up to 500°F (260°C). See model chart.
  • Switch Type: Snap action or mercury. See Electrical Circuits and Ratings on model chart page.
  • Electrical Rating: See Electrical Circuits and Ratings on Model Chart page.
  • Wiring Connection: G, WT or E enclosure, terminal board. EV enclosure 18″ (460 mm) leads.
  • Enclosures: G: painted steel and aluminum; WT: painted steel, aluminum and neoprene; E: aluminum; EV: aluminum and neoprene.
  • Wetted Parts: See Model Chart.
  • Approximate Weight: 301G, WT with 4-1/2″ SS float, 8 ft. rod, 5″ 125# cast iron flange: approximately 35 lb (16 kg) with E, EV enclosure: 39 lb (17.7 kg).
  • Suggested Specification: Liquid level control shall be top mount, float operated with fixed deadband for alarm service, (insertion depth, float and flange type to be specified). Circuit shall be hermetically sealed (SPST) (SPDT) DPDT snap action (mercury) switch. Enclosure shall be general purpose (weatherproof) (explosion-proof) (explosion-proof – vapor proof).

Model Chart DWYER 301

EXAMPLE 301 G 4810 AS 15 1.0 2 STW 301-G-4810-AS-15-1.0-2-STW Top mount Float Type Level Control, NEMA 1 enclosure, single stage mercury switch, 3-1/2″ x 6″ 304SS float, 316SS stops, 304SS extension, 1.0 specific gravity, 4″ 125# cast iron flange, with SS tag.
SERIES 301 Top Mount Float Type Level Control
ENCLOSURE G General Purpose, NEMA 1
WT Weather tight, NEMA 1, 2, 3, 4, 4X
E Explosion-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G, Div. I & II; CSA approved Groups C, D, E, F, G only
EV Explosion-proof/Vapor-proof, NEMA 7, 9, Class I Groups B, C, D, Class II Groups E, F, G, Div. I & II; CSA approved Groups C, D, E, F, G only
CIRCUITS 48XX Single Stage Mercury Switch, see chart A
78XX Single Stage, Snap Switch, see chart A
78XXHM Hermetically Sealed Snap Switch, see chart B
98XX Single Stage, High Capacity DC Snap Switch, use heat fins (HF) if process temperature exceeds 350°F (177°C), do not exceed 450°F (232°C), see chart B
FLOAT/
STOP/
GUIDE ROD		 00 No Float, No Guide Rod
AS 3-1/2″ x 6″ 304SS Float, 316SS Stops, 304SS Extension
BS 4-1/2″ Copper Float, 316SS Stops, 304SS Extension
CS 4-1/2″ 304SS Float, 316SS Stops, 304SS Extension
DS 7″ 304SS Float, 316SS Stops, 304SS Extension
ES 7″ Copper Float, 316SS Stops, 304SS Extension
A0 3-1/2″ x 6″ 304SS Float, 316SS Stops, No Extension
B0 4-1/2″ Copper Float, 316SS Stops, No Extension
C0 4-1/2″ 304SS Float, 316SS Stops, No Extension
D0 7″ 304SS Float, 316SS Stops, No Extension
E0 7″ Copper Float, 316SS Stops, No Extension
OPERATING
POINT		 XX ≥12 or ≤96. See Dimensional Drawing.
SPECIFIC
GRAVITY		 1.0 1.0 Specific Gravity
.9 0.9 Specific Gravity
.82 0.82 Specific Gravity
.75 0.75 Specific Gravity
.62 0.62 Specific Gravity
.50 0.50 Specific Gravity
FLANGE 0 No Flange
7 4″ 150# RF Carbon Steel
8 5″ 150# RF Carbon Steel
9 6″ 150# RF Carbon Steel
10 8″ 150# RF Carbon Steel
12 4″ 300# RF Carbon Steel
13 5″ 300# RF Carbon Steel
14 6″ 300# RF Carbon Steel
15 8″ 300# RF Carbon Steel
7S 4″ 150# RF 316SS
8S 5″ 150# RF 316SS
9S 6″ 150# RF 316SS
10S 8″ 150# RF 316SS
12S 4″ 300# RF 316SS
13S 5″ 300# RF 316SS
14S 6″ 300# RF 316SS
15S 8″ 300# RF 316SS
OPTIONS HF Heat Fins
STW SS Tag Wired
01 Breather Only (E-Housing only)
02 Drain Only (E-Housing only)
12 Breather and Drain (E-Housing only)
14210.40 Spec. 14210 for Sch 40
14210.80 Spec. 14210 for Sch 80
23720 Fungus Proofing

CHARTS A & B – ELECTRICAL CIRCUITS AND RATINGS

SWITCH TYPE
SWITCH ACTION
ELECTRICAL RATINGS IN AMPS
ORDERING CODE
AC
DC
SINGLE STAGE
120V
240V
440V
30V
125V
250V
CHART A
Mercury Contacts		 SP-ST open on level FALL
10
5
3†
10
5
-4821
SP-ST open on level RISE
10
5
3†
10
5
-4820
SP-DT one switch
4
2
1†
4
2
-4810
SP-DT two switches E.I.*
10
5
3†
10
5
-4815
DP-ST two switches E.I.* open on level FALL
10
5
3†
10
5
-4813
DP-ST two switches E.I.* open on level RISE
10
5
3†
10
5
-4814
DP-DT two SP-DT switches
4
2
1†
4
2
-4806
CHART B
snap action contacts		 SP-DT one switch
12
5
3†
0.5**
0.25**
-7810
DP-DT two SP-DT switches
12
5
3†
0.5**
0.25**
-7806
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‡
-9806
SP-DT one switch
10
3
10‡
3‡
-9810

User Guide and Instruction manual for DWYER 301

You can request the necessary certificates, documentation, instructions and user manuals for DWYER 301 using the special form.

You can buy DWYER 301 in UK or Europe at a favourable price in «DOLCHETRADE» by leaving a request on the website, by phone +441225535040 or by email . DWYER 301 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