The one i will discuss here uses a piston as the pressure sensing element. The mercoid d series is one of the worlds broadest lines of pressure switches. Designed for air conditioning service, they also serve many fluidics, refrigeration, oven and dryer applications. Dwyer instruments mercoid eda series manuals manualslib. Dwyer mercoid edawn1e106t1 pressure controller, series. When pressure rises to 50 psi, mercury switch b will open its circuit. The mercoid switch contacts open on a system pressure rise and close on a system pressure drop. Pressure, vacuum, differential pressure and temperature switches 1 0 0 b 0 8 100 series 100 series features single switch output epoxy coated and gasketed cast aluminum enclosure type 4x tamperresistant set point lock heat trace and freeze protection thermostats proof pressures to 10,000 psi 689,5 bar. Mercoid series da operating options dwyer instruments. Mps251cd30d pressure switch, 6 to 30 psig setpoint range, 14 npt male port, 3a spdt switch output 1 0. Established in 1916, mercoid has been serving industry for over 80 years. Mercoid series da ds bourdon tube pressure switches visible. Pressure high pressure switch 8 the trout underground. The pressure switch is a ul approved product only if it has a mark on the body.
Manuals and user guides for dwyer instruments mercoid eda series. Mercoid series 3100 smart pressure transmitter is a microprocessorbased high performance transmitter, which has flexible pressure calibration, push button configuration, and programmable using hart communication. Dwyer instruments dwyer da3129 bourdon tube pressure switch. The switch may be designed to make contact either on pressure rise or on pressure fall. A wide selection of wetted parts materials for media compatibility and containment are available. Switch indication external led for each relay on the front panel. Specifications characteristic hp series he series me series mh series lp series le series 5000 series series rated thermal current 5 a 3 a 3 a na 5 a 3 a na na rated insulation voltage 28 v 28 v 28 v na 28 v 28 v na na. In any case, the operating principle for this piston type is the same with a diaphragm or bellow type pressure. Check stock and pricing, view product specifications, and order online. Honeywell pressure control and limit cross reference. Two opposing bellows in the mercoid series dp differential pressure switch result in maximum sensitivity, quick response to changes and good vibration resistance. Pump control switch a mercoid da312 pressure switch is provided on the unit to start the lag pump, which will run simultaneously with the lead pump when building water usage is great, or if the lead pump is not providing enough flow for any reason. Diap op press switch, dawc20, f da temp switch, 20ft wp, pressure switch wc, drwle, manual. The d series has extremely high sensitivity and great repeatability.
The fixed differential sensitivity of each switch for this particular range is 1 psi. Dwyer instruments mercoid eda series pdf user manuals. Normally open contacts 4 amp with internal mercury switch circuit closes on pressure rise. Service manual rzrp, rzqp9 series cooling only heat pump r410a 60hz sius281117.
The series sa1100 diaphragm operated pressure switches are weatherproof and explosionproof in one economical enclosure. Device to current pressure pressure manual switch action be replaced replacement range range type psi reset type breaks comments c437a1008 c437e1004 116 osi 0. Furnished standard for series d200 and d7200, also available on series d20, d30, d35, d40, d80, d500, and d900 pressure and temperature controls. View and download dwyer instruments mercoid eda series specificationsinstallation and operating instructions online. Series 1900 compact low differential pressure switches.
Specificationsfunctions of the device to be replaced maximum operating differential surge switch device to current pressure pressure manual switch action be replaced replacement range range type psi reset type breaks comments c437a1008 c437e1004 116 osi 0. However, some models are available with a manual reset feature which requires that the spdt circuit is supplied on most stocked mercoid controls and allows the control to 10 mercoid series da pressure switch pressure applications how to use mercoid. Atlas copco compressed air manual 8th edition compressed air manual 8 th edition. We have 1 dwyer instruments mercoid eda series manual available for free pdf download. One of the most common is the one with diaphragms or bellows as the sensing elements. Our most popular series 1900 compact low differential pressure switch combines advanced design and precision construction to make these switches able to perform many of the tasks of larger, costlier units.
Just a quick video showing a pair of old mercoid pressure switches i have. A pressure switch is a form of switch that operates an electrical contact when a certain set fluid pressure has been reached on its input. The series 3100 is capable of being configured for differential pressure or level applications with the zero and span buttons. Kp pressure switches are mainly used for gaseous fluid whereas kpi pressure switches are more for liquid and gaseous fluid. Output signal 4 to 20 ma, 1 to 6 vdc, 1 to 5 vdc, or 0 to 10 vdc direct or reverse. Pressure switches have different designs with different sensing elements. Liquid level control shall be mercoid 215 217 218 series with adjustable deadband of 12 24 36 48. Pressure, vacuum, differential pressure and temperature. Most pressure switches use a diaphragm or bellow as the sensing element. The mercoid electronic pressure controller replaces a separate gauge, two switches and a transmitter in your system, saving you money, installation time and panel space. Pressure, vacuum, differential pressure and temperature switches.
Whatever your application might be, it is most probable it can be fully satisfied with a d series pressure switch. Model number chart example edawn1e101t0sst series electronic pressure controller housing weatherproof process 14. Pressure switch shall be mercoid series da operated by a brass type 316. Other applications include condensate tanks and deaerators. How a pressure switch works learning instrumentation and. Low pressure p77bca type, high pressure p77bea type, and dual pressure p78mca type models with manual reset lockout lock out when the cutout pressure is. Mercoid pressure switches are available with mercury or snap action contacts. Pressure without 81 5 552 din rail pressure with pressure and vacuum switches mounting actuators manual override pneumatic pushin connection for semirigid mm connection tubing nfe 49100 tapped bsp via connector protection iec 529 permissible fluid. Mercoid series eda electronic pressure controller 2 switches, indicating gauge, and transmitter in one package mercoid series eda. Series mpcjr pump controller installation and operating manual. Single pressure switches pressure bourdon tube pressure switches pressure ranges to 8000 psi 551. Series eda electronic pressure controller specifications installation and operating instructions bulletin inedaw1 by dwyer mercoid p.
Series mpcjr pump controller installation and operating. The water pump pressure switch is adjusted at the factory to cut out when incoming pressure falls below 10 psi, and cut in when incoming pressure reaches 25 psi. Series 215 series 217 has one vertical and one horizontal flanged connection 1 rf forged steel ansi specifications. View online or download dwyer instruments mercoid eda series specificationsinstallation and operating instructions. Liquid level control shall be mercoid 211 2 214 series with. A single pointer on scale sets pressure point at which switch action occurs.
Upon a drop in pressure, mercury switch b will close its circuit at 49 psi. Switch shall have deadband fixed or adjustable up to a maximum of 100% of switch range. Mercury switches are a good choice for humid areas while snap switches are better able to resist vibration. Test your ammonia refrigeration knowledge in appendix e.
Follow equipment manufacturers instructions or proceed as follows. Customers tell us that the series dads are the best pressure switches made. Series dp double bellows differential pressure switch series dp. Series dp double bellows differential pressure switch.
These switches have visible calibrated dials for set points and onoff indicators to indicate switch actuation. The sensing element is sealed by a flexible diaphragm and a static oring. Control will operate at setpoint only upon a decrease in pressure. Pressure, vacuum, differential pressure and temperature switches 1 0 0 b 0 8 100 series 100 series features single switch output epoxy coated and gasketed cast aluminum enclosure type 4x tamperresistant set point lock heat trace and freeze protection thermostats proof pressures to. Dwyer mercoid edawn1e106t1 pressure controller, series eda 0300 psi range 14 npt connection two spdt switches, digital display and transmitter 316 stainless connection online from authorized dwyer mercoid distributor rsp supply. Download specifications installation and operating. Series sa1100 pressure switches weatherproof, explosionproof. The da models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure. Gas activated bulbs, unlike vapor pressure bulbs, do not have a. On the series 1630 large diaphragm pressure switch our highest precision conventional pressure switch provides maximum dependability. Suffix number after control number denotes number of circuits and circuit operation. High precision, digital pressure switch series zse40ise40. Designed for boiler applications, the mercoid series 123 is primarily used for low water cutoff or feedwater control. D bourdon tube pressure switches pressure ranges to 8000 psi 551.
Mercoid control m sdn bhd valves thermometers gauges. The mercoid series da ds is one of the worlds broadest lines of pressure switches. Gas activated bulbs, unlike vapor pressure bulbs, do not have any eleva. The system is placed in automatic operation once the water supply returns by depressing the manual reset lever. Sor pressure switches are rugged, fieldmounted instruments. The mercoid dads series is one of the worlds broadest lines of pressure switches.
Mercoid da70351537a pressure control switch da70351537a mercoid da70351537a pressure control switch mercoid model. Various operations possible include single adjustment fixed deadband, double adjustment adjustable deadband, manual reset increasing or decreasing pressure and two stage with each spst or spdt switch independently adjustable. Versions with automatic and manual reset available. Equipped with a single adjustment for setting operating point. A pressure switch is used to detect the presence of fluid pressure. The da models are equipped with two external adjustments, one for setting high pressure operating point, the other for setting low pressure operating point. Pressure switches are widely used in industry to automatically supervise and control systems that use pressurized fluids.
Series sa1100 diaphragm operated pressure switches are. Digital pressure switch how to order zse40 01 ise40 01 22 22 for vacuumcompound pressure for positive pressure 10. A pressure switch does this by applying the process pressure to a diaphragm or piston to generate a force which is compared to that of a precompressed range spring. Series pg gas pressuredifferential pressure switch is used. Dwyer instruments dwyer sa1111es5k2 pressure switch. Do not exceed the specified maximum allowable load.
Dwyer mercoid edawn1e106t1 pressure controller, series eda. If for some reason pressure switch should fall out of adjustment, follow instructions below. Pressure and temperature limits are 450 psi 31 bar. Bulletin l21 mercoid a division of dwyer instruments, inc. Dwyer instruments mercoid eda series specifications. Refer to installation instructions or consult our engineers. Otherwise it can cause damage or shorten the lifetime of the pressure switch. Industrial enclosed sealed housing diaphram operated control. Ul and csa listed, fm approved for general service.
Series dads7000 bourdon tube pressure switches are spdt snapaction switches that combine extremely high sensitivity and repeatability with easily adjustable set and reset points through noninteractive external adjustments. Mercoid series da ds bourdon tube pressure switches. Mercoid series 123 series 123125 boiler water level control. It features two spdt relays with onoff points that are fully adjustable over the range for control or alarm use. The mercoid series eda electronic pressure control is an extremely versatile compact package that can replace a separate gage, two switches, and a transmitter in a system saving money, installation time, and panel space. Spdt switches allow you to install alarm devices or other control circuits. Series 3200g explosionproof pressure transmitter series 3200g. A kp pressure switch can be connected directly to a singlephase. P77 and p78 series controls for single and dual pressure. Dwyer love controls, mercoid controls as9 pressure switch, adjustable 015 psi pressure control. Bourdon tube pressure switches how to order mercoid series d. The pressure sensing element of the sor pressure switch is a forcebalance, pistonactuated assembly.
For air and noncombustible compatible gases, series 1900 switches have set. Region 7 thanks all who contributed their time and expertise to the development of this manual. The dads series has extremely high sensitivity and great repeatability. Mercoid controls produces a broad range of pressure, temperature, and level controls for use in heavy industrial, petrochemical, and electrical utility plants.
Pressure switch shall be mercoid series da operated by a brass type 316 stainless steel type 403 stainless steel bourdon tube actuating a mercury switch snap switch. Series dads bourdon tube pressure switches have extremely. Uni standard unit of measurement for system pressure hi maximum value memory for system pressure lo minimum value memory for system pressure only pn7004 and pn7009 ds1ds2 switch on delay for out1 out2 dr1dr2 switch off delay for out1 out2 pn output logic. Mercoid offers bourdon tubes constructed in a choice of brass, type 403 stainless steel, and type 316 stainless steel. Jul 17, 2015 the mercoid pressure controller series da is the industry standard pressure switch for fire pump controls. Specifications installation and operating instructions. Bulletin l20 mercoid a division of dwyer instruments, inc. In addition, it incorporates a visible set point indicator for maximum convenience. Extremely rugged construction assures excellent reliability in chemical, petroleum and industrial plants. New design also provides burst pressure protection to 3000 psi 206 bar.
Use mercoid pressure controller for fire pump controls to operate pumps which supply water to building fire sprinkler systems, turning on the main pumps when system pressure falls due to sprinkler heads being activated and turning on smaller makeup pumps to maintain system pressure which. The reverse will occur when pressure or vacuum drops below the set point less the deadband. Mercoid series d pressure controls feature hermetically sealed mercury switches, bourdon tube power elements, visible setpoint, adjustable deadband or. Mercoid 3200g pressure transmitter manual pdf instrumart. Fixed deadband is factory set and cannot be altered in the field.
244 161 900 894 751 931 1352 1051 1584 1231 510 732 1541 1036 214 611 1461 762 1395 639 1297 436 154 1547 335 296 1280 973 817 31 1525 525 536 480 154 1158 489 983