1. Product Brief Introduction:
HQ-JY wing wind measurement device, like other wind measurement
devices, is a measuring tool for monitoring the combustion air
volume of boilers. It can be used to measure the air flow of
boilers. It can be directly installed on the cold and hot air ducts
between the inlet of the air supply fan and the burner. Due to its
unique structure, the requirements for the front straight pipe
section are much lower than other measurement components during
installation, and it is not easy to block. It is superior to other
measurement components in terms of maintenance and repair,
requirements for the cross-sectional shape of the air duct, and the
influence on the airflow flow within a certain range before and
after the device. This device can generate a pressure difference
signal of 0-100mmH20 or larger, which is converted into a standard
electrical signal (0-10mA or 4-20mA) by a differential pressure
transmitter. The signal is stable. It can achieve safe and
economical operation of boilers.
2. Product Features:
(1) This device has a unique wing shaped throttling element that
can generate a large differential pressure signal, ensuring stable
and reliable measurement; High precision.
(2) Adopting a dual wing or multi wing structure, the device itself
has a short length and low requirements for the length of the front
and rear straight pipe sections.
(3) Due to its streamlined design on the end face, the throttling
element of this device has low fluid resistance and pressure loss,
resulting in a pressure loss not exceeding 14% of the differential
pressure value; Within the range of high flow rate (30%~10%), the
measurement error is less than 2% of high flow rate.
(4) No movable parts, easy to install and maintain.
3. Product Performance:
(1) Composition of wing wind measurement device:
The wing wind measurement device consists of wing sensors, valve
groups, and differential pressure transmitters.
(2) Measurement principle of wing wind measurement device:
This device consists of a wing installed in a rectangular or
circular air duct, a differential pressure measuring device, and a
section of air duct. Each throttle line of the wing is divided into
four sections, with three sections being arc-shaped plates with
different curvature radii, and the fourth section being a straight
plate. According to the principles of fluid mechanics, when the
airflow in the air duct passes through the wing measuring device,
as shown in Figure 1, it generates a flow around the wing surface
and creates a pressure difference between stagnation point A and
chord point B (B '). The pressure at point A is full pressure, and
the pressure at chord point B (B ') is static pressure. Due to the
contraction of the flow cross-section at B (B '), the static
pressure decreases, resulting in a relatively large pressure
difference between A and B (B'). There is a certain functional
relationship between the pressure difference △ P and the airflow
velocity V (or flow rate 0): V=f (OP.R)
V constant velocity, △ P pressure difference, R flow
cross-sectional shrinkage ratio
4. Specification Type:
Note: (1) Before selecting the product, perform flow calculation on
the application software package. To verify the application
scenario, complete parameter conditions are required;
(2) Other special materials are optional, please contact the
manufacturer directly for specific details.
5. Selection:
HQ-JY Selection Table for Wing Wind Measurement Devices
| HQ-JY | Wing wind measurement device |
| Nominal Diameter | □ | DN20-2000 |
| Connection Method | P | Pipeline direct welding type |
| F | Rectangular flange type |
| S | Flat welding flange connection type |
| Material of Throttling Element | Q | SS304 |
| L | SS321 |
| A | SS316 |
| B | 15CrMoG |
| E | 1Cr5Mo |
| F | 16Mn |
| H | HC276 |
| P | PTFE |
| M | Monel |
| W | SS316+ Tungsten carbide spraying |
| T | Wear-resistant alloy steel |
| S | Other materials |
| Valve Body Material | Q | SS304 |
| L | SS321 |
| A | SS316 |
| C | 20# |
| G | 20#(iron alloy) |
| D | Q235(iron alloy) |
| B | 15CrMoG |
| E | 1Cr5Mo |
| F | 16Mn |
| H | HC276 |
| P | PTFE |
| M | Monel |
| S | Other materials |
| Material of Pressure Tap and Short Tube | Q | SS304 |
| L | SS321 |
| A | SS316 |
| B | 15CrMoG |
| E | 1Cr5Mo |
| F | 16Mn |
| H | HC276 |
| P | PTFE |
| M | Monel |
| S | Other materials |
| Flange Standard | 0 | Meaningless |
| 1 | HG20592-2009(Ministry of Chemical Industry) |
| 2 | HG20615-2009(American Standard) |
| 3 | GB/T9115-2010(New Standard of the Ministry of Chemical Industry) |
| 4 | JB/TB1-94(National Standard) |
| 5 | Rectangular flange |
| Compensation Form | N | Without compensation |
| A | Temperature compensation |
| B | Pressure compensation |
| C | Temperature and pressure compensation |
| Measuring Medium | A | Air volume |
| Pressure Rating | A | 0.25 MPa |
| B | 0.6 MPa |
| C | 1.6 MPa |
| D | 1.6 MPa |
| S | Special customization |
| Flange Sealing Surface | 0 | Meaningless (for direct welding selection) |
| 1 | RF |
| 2 | RJ |
| 3 | MF |
| 4 | FF |
| 5 | TG |
| 6 | Other |
| Pressure Port Specifications | 1 | 1/2”NPT thread |
| 2 | 3/4”NPT thread |
| 3 | Socket welding - connecting pipe Φ14 |
| 4 | Direct welding - takeover Φ14 |
| 5 | Other types |
*The integrated pressure tapping valve, three valve group, and
pressure tapping short pipe are welded to the flow body as a
complete set for supply. The material of the pressure tapping short
pipe/pressure tapping valve/three valve group is the same as that
of the pressure tapping port (according to the on-site process
requirements, the pressure tapping valve can choose socket welded
globe valve, socket welded gate valve or other types and materials
of valves). The matching flange material is the same as that of the
on-site pipeline material, and the transmitter is matched according
to user needs.
**The split type does not include all installation accessories.
When ordering, it should be matched according to user needs, and
the matching flange material should be the same as the on-site
pipeline material.
