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WB/POM-Series
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Piston Operated Mixers (POM) with Water Bath Vaporizers
Model Numbers are WB-168/POM-30 to WB-2505/POM-60. The first part of the model number indicates the vaporizer capacity in gallons per hour, the second part indicates the mixer size (-30, -40, -60). All systems combine horizontal water bath vaporizers (08-series or 05-series) with our patented Piston Operated Mixer (POM-series). They can be ordered for installation as individual units (water bath vaporizer and mixer within 15 ft [4.5m] of each other), or as a very compact "Module Unit" (see options), with the POM in "vertical" orientation and installed on the same skid with the vaporizer. In Module Units, all piping between the vaporizer and the blender, and all wiring between the blender and the control panel, are factory-installed, which can reduce installation time considerably. Both versions are equally reliable and have set the standard for value, reliability, ease-of-use, low maintenance, and high availability, in many different applications in many different countries, surpassing other high-capacity / high-pressure blender concepts by far.
To select the correct vaporizer/blender combination, first determine the required vaporizer capacity by adding up the connected load. Including a safety factor of 1.1 to 1.3, then select the appropriate vaporizer model. The capacity of the POM mixer depends on its configuration and the system pressure. In the table below, after selecting the vaporizer model, move to the right to the desired discharge pressure to find the POM model number and the price for the vaporizer/blender combination.
All WB/POM systems share a control panel between the WB vaporizer, the POM blender, and all system accessories. The standard PLC is a Siemens S7-1200, or an Allen-Bradley MicroLogic-1400. All PLCs have a built-in Ethernet Interface, and communicate with an Electronic Operator Interface (EOI) with high-resolution color LCD display and Touch Screen. Electrical connections between the POM blender and the control panel are made in two different ways:
In module units (POM mixer on same skid with vaporizer), electrical connections run from the mixer unit directly to the control panel. In individual units, all electrical connections are terminated in an explosion proof junction box at the POM skid. From there, a multi-wire cable (not included with system) is run to the mixer control panel in the vaporizer control room.
The WB/POM Series is designed for outdoor installation and requires only nominal preventive maintenance. Intended for intermittent or continuous service, the systems are manufactured to meet or exceed requirements of the ASME Pressure Vessel Code Section VIII, and the latest edition of NFPA Pamphlet #58. They are approved by Factory Mutual (FM) and Canadian Standards Association (CSA), and are suitable for Industrial Risk Insurers (IRI) installations. They can also be configured for European countries (including PED, ATEX, etc.) and carry the CE Mark. All systems are factory tested, primed, painted and ready for installation. They come with 2 sets of operating manuals and test reports. All vaporizers in WB/POM systems are equipped with Rosemount Pressure and Temperature Transmitters in the Vapor Outlet of the vaporizer for "smart" Liquid Carryover Protection, based on pressure/temperature correlation and LPG type (Propane/Butane/...). Nominal Capacity in BTU per hour and NatGas Equivalent** (m3/h; in bottom row) is strictly based on the vaporization capacity of the vaporizer, and is given for Propane/Air mixtures with 1450 BTU/cuft at delivered mixed gas pressures of 10 psig (0.7 bar) to 70 psig (5 bar). Capacity for other LPG/Air mixtures and/or pressures may vary. Nominal Capacity is based on vapor and compressed air inlet pressures of 100-125 psig, and a pressure drop of 10% across the mixing valve at maximum flow. The minimum vapor and air supply pressures are "Sendout Pressure + 15 psi (1bar)".
Other Vaporizer/Blender configurations (for lower or higher delivery pressures, higher flow rates, other blending gasses, different materials, ...) are available. Please contact the factory or your area distributor for details.
** NatGas Equivalent: In most cases, these systems will be used to provide backup for a NatGas supply. Including a sufficient safety factor (1.1 ... 1.3), use the maximum expected (peak) NatGas flow per hour to select the correct WB/POM model.
|
Vaporizer |
Nominal Capacity MMBTU/h |
NatGas** Equivalent Nm³/h |
System Pressure |
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|
10 psi |
20 psi |
30 psi |
40 psi |
50 psi |
60 psi |
70 psi |
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|
WB-168 |
15 |
424 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-208 |
19 |
538 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-258 |
24 |
679 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-308 |
28 |
792 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-358 |
33 |
934 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-408 |
37 |
1047 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-458 |
42 |
1198 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-508 |
47 |
1330 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-555 |
51 |
1444 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-655 |
60 |
1699 |
POM-40-9 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-755 |
69 |
1953 |
POM-40-9 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-855 |
79 |
2237 |
POM-40-9 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-1005 |
92 |
2605 |
POM-60-9 |
POM-40-9 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-1205 |
111 |
3143 |
POM-60-9 |
POM-40-9 |
POM-40-9 |
POM-40-9 |
POM-30-9 |
POM-30-9 |
POM-30-9 |
|
WB-1505 |
139 |
3936 |
POM-60-9 |
POM-60-9 |
POM-40-9 |
POM-40-9 |
POM-40-9 |
POM-30-9 |
POM-30-8 |
|
WB-1805 |
166 |
4700 | POM-80 |
POM-60-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
|
WB-2005 |
185 |
5238 | POM-80 |
POM-60-8 |
POM-60-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
|
WB-2205 |
203 |
5748 | POM-80 |
POM-60-8 |
POM-60-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
|
WB-2505 |
231 |
6541 | POM-80 |
POM-60-8 |
POM-60-8 |
POM-60-8 |
POM-40-8 |
POM-40-8 |
POM-40-8 |
|
The above prices include Option POMOPTMOD, Single-Skid-Installation |
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POM-30, POM-40, and POM-60 are available with Fisher 99 or Fisher 1098 EGR regulators for installations with sufficiently high LP-vapor supply pressure (100-125 psi) and should be used only if the LPG consists at least of 80% Propane. Higher Butane content and/or lower LP-vapor pressure require different regulator configurations. For discharge pressures above 75psi (5 bar) POMs are configured with a Fisher V-Ball control valve on the air side. Specifications are subject to change without notice. |
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Options and Accessories |
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| Part Number |
Description |
Price in US-$ |
|
|
GB-3E |
Option: GraviBlend®-3, Gravitometer for LPG/Air mixtures, Explosion-Proof Configuration for classified areas, Range 0.2 … 2.2 (relative density). High-speed, high-accuracy, on-line gravitometer; measures and indicates specific gravity of mixed gas. Separate enclosures for electronic components, gas distribution elements, and gravity sensor. Electronics Enclosure (see Note 1): powder coated steel NEMA 4 wall-mount enclosure; full-graphic 6-inch color LCD display with touch screen operator interface; direct display of Specific Gravity, Calorific Value, and Wobbe Index number; electronic signal processor (see Note 1) with alarm contacts; internally powered analog output signal 4...20 mA (source; scaled to 0.4 - 2.0 SG) for external recording instruments; AC 110 V 60 Hz; graphic trend recording function for Specific Gravity (stored on SD card); semi-automatic calibration feature. Gas Distribution Enclosure: powder coated steel NEMA 4 wall-mount enclosure; integrated filter element in sample gas line; integrated consumption jet in sample gas line; integrated sample gas bypass with precision instrument valve; 1/8" bulkhead fittings for connection to Sensor Enclosure. Sensor Enclosure: explosion-proof aluminum junction box with gravity sensor and signal conditioner, wall-mount (horizontally). |
$ |
|
|
GB-3P |
GraviBlend®-3P, Gravitometer for LPG/Air mixtures, Portable Configuration for non-classified areas, Range 0.2 - 2.2 (relative density). High-speed, high-accuracy, portable gravitometer; measures and indicates specific gravity of mixed gas. "Schroff" 19"-Instrument Enclosure with carrying handle; integrated filter element in sample gas line; integrated consumption jet in sample gas line; integrated sample gas bypass with precision instrument valve; full-graphic color LCD display with high-resolution touch screen operator interface; direct display of Specific Gravity, Calorific Value, and Wobbe Index number; electronic signal processor; internally powered analog output signal 4...20 mA (source; freely scalable; can be assigned to SG or Wobbe Index) for external recording instruments; graphic trend recording function for Specific Gravity (stored on SD card); semi-automatic calibration feature. World power supply AC90...240V 47...63Hz; |
$ |
|
|
POMOPTACC |
Option: AccuBlend™ System, Automatic Gas Properties Control. Electric actuator to adjust the angular position of the piston in the POM, and thereby correcting the calorific value of the mixed gas. Actuator is installed on top of the POM valve. Price includes controller with PID characteristics (integrated in electronic signal processor of GraviBlend®-3/3E; see Note 1), which receives a linear analog signal (4-20 mA or 0-5V) from the Gravitometer and sends a control signal to the actuator (requires "Option: Gravitometer"). |
$ |
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POMOPTFLOW |
Flow Transmitter in sendout line; real-time SNG flow display on EOI. If the POM is equipped with a Gravitometer, LPG vapor flow, compressed air flow, and liquid LPG flow are also displayed. Dual Flow Totalizer (with individual reset) is standard for all displayed flow values. |
$ |
|
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POMOPTMOD |
Option: Module Unit. Installation of POM on same skid with water bath vaporizer. |
-30 -40 -60 -80 -100 |
$ |
|
POMOPTEX 1 |
Option: Ex-proof control components; required for installations where the POM is more than 15 ft. away from a gas-fired vaporizer (U.S. rules), or where required by local law. Includes explosion-proof pressure transmitters in vapor supply line, air supply line, and mixed gas line. Includes explosion-proof control panel enclosure, mounted directly at the blender skid. |
$ |
|
|
POMOPTEX 2 |
Option: Ex-proof control components; required for installations where the POM is more than 15 ft. away from a gas-fired vaporizer (U.S. rules), or where required by local law. Includes explosion-proof pressure transmitters in vapor supply line, air supply line, and mixed gas line. Includes powder coated NEMA 4 wall-mount enclosure for system control panel, to be installed in non-classified area. Interconnecting cable between explosion proof junction box at the blender skid and control panel is to be supplied and installed at job site. Maximum distance between mixer and control panel approximately 2000 ft. (600 m). Includes local Start/Stop station, installed on blender skid. |
$ | |
|
POMOPTCE |
Option: CE Approval for vaporizer and blender; compliant with PED, ATEX, and all other applicable European Directives. |
-30 -40 -60 -80 -100 |
$ |
|
POMPKSHV |
Option: Electronic PeakShaving Controller. Includes Allen-Bradley PLC upgrades (SLC-5/05 with Ethernet Interface; 12-inch color LCD display with Touch Screen Operator Interface; Analog Output for Flow Control Valve). Includes user-selectable PeakShaving modes (i.e. "Inject fixed SNG Volume"; "Limit NG Flow"; "Maintain NG/SNG Ratio"; ...). Includes electronically controlled Flow Control Valve in Mixed Gas Sendout Line (pneumatically actuated); Thermal Mass Flow Transmitter in Mixed Gas Sendout Line; Analog Inputs for Grid Flow (or NatGas Flow), and Grid Pressure; block valve in Mixed Gas Sendout Line (pneumatically actuated). |
Contact |
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Note 1: If the GraviBlend®-3E gravitometer is ordered together with a POM blender, the electronic signal processor of the gravitometer will be integrated into the PLC of the POM. The electronic operator interface will be a high-resolution color LCD display with touch screen operator interface. |
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Last Update 31 JAN 2019