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HVS
LPG-Vapor / Air Mixers with Water Bath Vaporizers
Model Numbers are
WB-168/HVS-14 to WB-3000/HVS-250. The first part of the model number
indicates the vaporizer capacity in gallons per hour; the second part
indicates the mixer capacity in MMBTU per hour. All systems combine
horizontal water bath vaporizers (08-series or 05-series) with
Venturi-type mixing systems (HVS-series). They come complete with
vaporizer, venturi mixer, surge tank, interconnecting piping, electrical
and safety controls, and are mounted on a common steel skid. This design
concept makes them very compact, easy to install and to maintain, and
very reliable.
All systems are factory-tested
prior to shipping. After placing a system on a non-combustible surface
(i.e. concrete pad), filling the vaporizer with heat transfer solution,
and connecting it to electrical supply, liquid gas supply, and mixed gas
outlet, it is immediately ready to produce high-quality gas which is
directly compatible and interchangeable with NatGas.
Standard design output
pressure is 5 to 8 psi, or 9 to 12 psi (please specify desired output
pressure with order). Higher pressures up to 40 psi are also available
and require compressed air for operation. In system with High Pressure
Option, the surge tank is ASME U-stamped .
All WB/HVS systems monitor the
gas pressure in the surge tank, using a pressure transmitter that is
connected to a Siemens or Allen-Bradley PLC. The PLC, which is shared
with the vaporizer, “sequences” the venturi lines and controls all mixer
safety functions. The PLC also communicates with a color LCD display
with Touch Screen Operator Interface, displaying system pressures, and
any trouble conditions that may occur.
The WB/HVS series is designed for outdoor installation
and requires only nominal preventive maintenance. Intended for
intermittent service (see Note), 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.
All systems are factory
tested, primed, painted and ready for installation. They come with 2
sets of operating manuals and test reports. All vaporizers are equipped
with “smart” Liquid Carryover Protection.
All HVS Mixers are equipped
with two solenoid valves per venturi train. The “dynamic” solenoid valve
opens and closes each time a venturi train is activated to produce mixed
gas. The “static” solenoid valves opens when the mixer is started and
stays open until the mixer is stopped, or until a high-pressure alarm
occurs. This feature provides an additional level of safety, and
prevents the unwanted discharge of mixed gas in case of a failure of the
“dynamic” solenoid valve.
The mixer sendout pressure and
the sequencing of the venturi lines (differential pressure between
trains; ON‑OFF deadband) can be adjusted through simple inputs at the
touch screen. A separate “Venturi Cycle Counter” for each venturi train
increments each time a venturi train is activated. This information can
be used to determine when the mechanical components of a venturi train
should be closely inspected, overhauled, or replaced.
The required vapor supply
pressure depends on the desired sendout pressure, on the type of
available LPG (Propane/Butane content), and on other factors (i.e.
altitude). Typical supply pressures for “Propane” and 5-8 psi sendout
pressure are 30-60 psi. Systems with higher sendout pressure of 9-12 psi
require considerably higher vapor supply pressure, which can be
difficult to maintain in very cold climates. Mixed Gas Sendout Pressures
of more than 12 psi require the High Pressure option, which includes a
surge tank with ASME “U”-Stamp.
Please Note: Venturi-based
LP/Air mixers are generally considered “for intermittent use”. Due to
the relatively limited useful life of their dynamically exercised
mechanical components (regulators, check valves, solenoid valves, air
intake valves, etc. are typically specified by their respective
manufacturers to withstand 200000 to 500000 cycles), they are not very
well suited for baseload applications. Their main application is
“Emergency Backup”.
|
|
Model Number |
Nominal
System
Capacity
MMBTU |
Number
of
Venturis
|
Surge
Tank
Capacity
US-gal
(m³) |
Approximate
Skid Size
Inches (m)
W x L x H |
Price
in US-$
5 - 8 psi
Version |
Price
in US-$
9 - 12 psi
Version |
Price
in US-$
High Pressure
Option |
| WB-168 / HVS-14 |
14 |
2 |
120 (0.450) |
W = 60 (1.52)
L = 132 (3.35)
H = 112 (2.84) |
$ 42,800.00 |
N/A |
$4,813.00 |
| WB-208 / HVS-17 |
17 |
2 |
120 (0.450) |
$ 44,800.00 |
N/A |
$4,813.00 |
| WB-258 / HVS-20 |
20 |
2 |
120 (0.450) |
$ 48,800.00 |
$ 52,490.00 |
$4,813.00 |
| WB-308 / HVS-27 |
27 |
3 |
120 (0.450) |
$ 59,860.00 |
N/A |
$6,724.00 |
| WB-358 / HVS-30 |
30 |
3 |
120 (0.450) |
$ 61,860.00 |
$ 67,400.00 |
$6,724.00 |
| WB-408 / HVS-37 |
37 |
4 |
120 (0.450) |
$ 71,390.00 |
N/A |
$8,413.00 |
| WB-458 / HVS-40 |
40 |
4 |
120 (0.450) |
$ 72,890.00 |
$ 80,270.00 |
$8,413.00 |
| WB-555 / HVS-50 |
50 |
5 |
250 (0.950) |
W = 72 (1.83)
L = 142 (3.61)
H = 112 (2.84) |
$ 97,739.00 |
$ 98,927.00 |
$9,908.00 |
| WB-755 / HVS-60 |
60 |
6 |
250 (0.950) |
$ 117,364.00 |
$ 118,386.00 |
$11,599.00 |
| WB-855 / HVS-70 |
70 |
7 |
250 (0.950) |
$ 127,537.00 |
$ 128,073.00 |
$13,289.00 |
| WB-1005 / HVS-80 |
80 |
8 |
500 (1.893) |
W = 84 (2.13)
L = 164 (4.17)
H = 112 (2.84) |
$ 142,410.00 |
$ 143,614.00 |
$14,787.00 |
| WB-1005 / HVS-90 |
90 |
9 |
500 (1.893) |
$ 151,478.00 |
$ 152,236.00 |
$16,695.00 |
| WB-1205 / HVS-100 |
100 |
10 |
500 (1.893) |
$ 164,753.00 |
$ 165,863.00 |
$18,386.00 |
| WB-1505 / HVS-110 |
110 |
11 |
500 (1.893) |
$ 181,457.00 |
$ 181,589.00 |
$20,077.00 |
| WB-1505 / HVS-120 |
120 |
12 |
500 (1.893) |
$ 186,034.00 |
$ 187,476.00 |
$22,745.00 |
| WB-1505 / HVS-130 |
130 |
13 |
500 (1.893) |
$ 192,526.00 |
$ 193,363.00 |
$24,435.00 |
| WB-1805 / HVS-140 |
140 |
14 |
500 (1.893) |
W = 98 (2.49)
L = 272 (6.91)
H = 112 (2.84) |
$ 211,564.00 |
$ 212,307.00 |
$26,126.00 |
| WB-1805 / HVS-150 |
150 |
15 |
500 (1.893) |
$ 217,476.00 |
$ 218,196.00 |
$27,816.00 |
| WB-2005 / HVS-160 |
160 |
16 |
500 (1.893) |
$ 238,847.00 |
$ 239,934.00 |
$29,311.00 |
| WB-2005 / HVS-170 |
170 |
17 |
1000 (3.785) |
$ 245,373.00 |
$ 245,822.00 |
$31,002.00 |
| WB-2005 / HVS-180 |
180 |
18 |
1000 (3.785) |
$ 257,145.00 |
$ 256,746.00 |
$32,693.00 |
| WB-2205 / HVS-190 |
190 |
19 |
1000 (3.785) |
$ 267,350.00 |
$ 267,514.00 |
$34,189.00 |
| WB-2205 / HVS-200 |
200 |
20 |
1000 (3.785) |
$ 273,398.00 |
$ 273,902.00 |
$35,877.00 |
| WB-2505 / HVS-210 |
210 |
21 |
1000 (3.785) |
$ 293,476.00 |
$ 294,255.00 |
$38,742.00 |
| WB-2505 / HVS-220 |
220 |
22 |
1000 (3.785) |
$ 305,181.00 |
$ 305,201.00 |
$40,431.00 |
| WB-3005 / HVS-230 |
230 |
23 |
1000 (3.785) |
call factory |
$ 322,727.00 |
$ 323,548.00 |
$41,927.00 |
| WB-3005 / HVS-240 |
240 |
24 |
1000 (3.785) |
call factory |
$ 329,254.00 |
$ 329,434.00 |
$43,617.00 |
| WB-3005 / HVS-250 |
250 |
25 |
1000 (3.785) |
call factory |
$ 341,009.00 |
$ 340,357.00 |
$45,309.00 |
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Actual number of venturi
arrangements may vary with mixed gas pressure. Weights and dimensions are
approximate. Specifications are subject to change without notice. Call
factory or distributor for price quotation and actual lead times. |
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