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DWYER 391/393/394 side mounted-chamber type level control

Heavy duty and low cost is the perfect description for the Series 391 Level Control level control. Stainless steel switching mechanism uses gravity return action instead of springs for long life. Weatherproof enclosure is standard. Welded steel chamber is good for 650 psig (45 bar) at 600°F (315°C).

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Made in USA. brand DWYER, model 391/393/394

Fast delivery to Latvia, Estonia and Lithuania. International delivery to Europe, Asia, Africa and other continents available on request
Our warehouse is located in Riga, Latvia.

price by request

Available

Available

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

Advantages

Official distributor in Latvia

Time-tested American, European and Asian brands of control and measurent instruments

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Special price list for organisations

We offer a significant discount for trade organisations and manufacturing companies

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Worldwide shipping on request

We take care of all logistics and customs clearance. Fast delivery to Baltic countries

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After-sales service and support

Warranty service and repair, expert assistance in the operation of the instruments

Description of DWYER 391/393/394

PRODUCT APPLICATIONS

  • Refineries
  • Chemical plants
  • Power generating stations
  • Water treatment plants
  • Mixing systems
  • Scrubbers
  • Accumulators
  • Condensate recovery
  • Industrial tanks and vessels

Technical specifications of DWYER 391/393/394

  • Service: Compatible liquids.
  • Wetted Materials: Body: carbon steel; Float and Trim: 303 SS, 304 SS, 316 SS, and 430 SS.
  • Temperature Limits: Ambient Temperature: 212°F (100°C); Process Temperature: up to 600°F (315.6°C)*.*Heat fins and/or high temperature switches must be used for process temperatures above 500°F (260°C) with mercury switches, 400°F (204°C) with snap switches, and 350°F (176.7°C) with hermetically sealed snap switches.
  • Pressure Limits: 800 psig (55 bar) at 100°F (37.7°C), 650 psig (45 bar) at 600°F (315.6°C). Higher ratings available.
  • Enclosure Rating: NEMA 4X. Optional general purpose or explosion-proof.
  • Switch Type: SPDT snap switch, hermetically sealed snap switch or mercury switch. Optional DPDT.
  • Electrical Rating: Snap Switch: 12A @ 120 VAC, 5A @ 240 VAC, 0.5A @ 125 VDC resistive, 0.25A @ 250 VDC resistive. Hermetically Sealed Snap Switch: 5A @ 125 VAC, 5A @ 240 VAC, 5A @ 30 VDC resistive. Mercury Switch: 4A @ 120 VAC/DC, 2A @ 240 VAC/DC. Higher contact ratings available for the mercury switch.
  • Electrical Connections: Screw terminal.
  • Conduit Connection: 3/4″ female NPT.
  • Connections: 1″ female NPT. Optional 1″ socket weld hub or flange connections.
  • Mounting Orientation: Vertical.
  • Weight: 10 lb (4.5 kg).
  • Agency Approvals: UL, none on HM switch.
  • Specific Gravity: 0.8 minimum. Optional 0.7 minimum.

Model Chart DWYER 391/393/394

SERIES 391, 393, 394 LIQUID LEVEL CONTROL       
     
     391-X-X-X-X-OPT MERCOID 391 LIQUID LEVEL CONTROL
     393-X-X-X-X-OPT MERCOID 393 LIQUID LEVEL CONTROL
     394-X-X-X-X-OPT MERCOID 394 LIQUID LEVEL CONTROL

	1ST SYMBOL (1ST X) ENCLOSURE
	   G       GENERAL PURPOSE NEMA 1
	   WT      WATERTIGHT NEMA-4, 4X
	   E       EP CL I GRP B,C,D CL II GRP E,F,G NEMA-7, 9
	   EV      EP VP CL I GRP B,C,D CL II GRP E,F,G NEMA-7, 9
   
	2ND SYMBOL (2ND X) CIRCUITS
	   4806    5806  7806HM
	   4810          7810HM
	   4813          7806GLD
	   4814    
	   4815      
	   4820      
	   4821      
	   7804    
	   7806    
	   7807    
	   7810    
	   9804    
	   9806    
	   9810    
	   1010    
	   1006    
	   4912    
	   4951    
	          
	          
   
	3RD SYMBOL (3RD X) CHAMBER MATERIAL
	   C1      CARBON STEEL BODY
   
	4TH SYMBOL (4TH X) MINIMUM SPECIFIC GRAVITY
	   70      0.70 SPECIFIC GRAVITY                   (391 ONLY)
	   80      0.80 SPECIFIC GRAVITY                   (391 ONLY)
	   95      0.95 SPECIFIC GRAVITY                   (391 ONLY)
	   170     0.70 SPECIFIC GRAVITY & 150# FLANGE     (393,394 ONLY)
	   180     0.80 SPECIFIC GRAVITY & 150# FLANGE     (393,394 ONLY)
	   195     0.95 SPECIFIC GRAVITY & 150# FLANGE     (393,394 ONLY)
	   370     0.70 SPECIFIC GRAVITY & 300# FLANGE     (393,394 ONLY)
	   380     0.80 SPECIFIC GRAVITY & 300# FLANGE     (393,394 ONLY)
	   395     0.95 SPECIFIC GRAVITY & 300# FLANGE     (393,394 ONLY)
	   670     0.70 SPECIFIC GRAVITY & 600# FLANGE     (393,394 ONLY)
	   680     0.80 SPECIFIC GRAVITY & 600# FLANGE     (393,394 ONLY)
	   695     0.95 SPECIFIC GRAVITY & 600# FLANGE     (393,394 ONLY)
   
	OPTIONS (OPT)
	   -H2      H2 SOCKET WELD HUB           (391, STEEL HOUSING ONLY)
           -STW     SS TAG WIRED
           -01      BREATHER ONLY                (E-HOUSING ONLY)
           -02      DRAIN ONLY                   (E-HOUSING ONLY)
           -12      BREATHER AND DRAIN           (E-HOUSING ONLY)
	   -23720   FUNGUS PROOFING SPEC 23720


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User Guide and Instruction manual for DWYER 391/393/394

You can request the necessary certificates, documentation, instructions and user guide for DWYER 391/393/394 using the special form.

You can buy DWYER 391/393/394 in Latvia at a favourable price in «OLIL SIA» by leaving a request on the website, by phone +371 672 70580 or by email . DWYER 391/393/394 price are subject to change depending on exchange rates. We deliver instruments by transport companies in Latvia, Estonia and Lithuania. Worldwide shipping to Europe, Asia, Africa, North and South America available on request.