URH - 圆形排气阀
URH 排气阀具有一个可调节的中心锥和一个套管，由不锈钢制成，经过白色 (RAL 9010) 标准色彩喷漆处理。URH 配有镀锌钢材质的安装架。该安装架中包含一个密封垫片。
- Dimensions and weight
- Order Code
Circular exhaust valve
- Exhaust air valve.
- Wall or ceiling installation.
- Adjustable airflow rate.
- Ability to measure airflow rate.
- Installation with or without a separate installation frame.
Product models and Accessories
- Installation with fixed springs.
- Alternative installation frame options.
Dimensions and weight ▲
|Installation frame||Galvanised steel||Gasket of rubber compound|
|Finishing|| Painted |
white (RAL 9010)
|Special colours available|
|Cover plate||CS|| For protection of the surfaces from |
smudging and for directing the air jet
in a grid-structured ceiling
|Extension part||EP|| Extension part for detaching the |
valve from the surface/
standard height 50 mm
|Installation frame||LF|| Installation frame without gasket/ |
height 50 mm
|Installation frame||GF|| Installation frame with gasket/ |
height 50 mm
|Installation frame||DF|| Installation frame with duct |
dimensions can be installed directly to duct
parts such as bending or T-branch etc
Fig.1. Cover plate (CS) Fig.2. Extensions part (EP)
Fig.3. Installation frame (LF) Fig.4. Installation frame (GF)
Fig.5. Installation frame (DF)
The valve throttles the exhaust airflow and attenuates the duct noise. The pressure drop is dependant on the position of the central cone. The desired exhaust airflow rate is adjusted during the balancing of the airflows in a ductwork system. After the adjustment the valve is locked at the required adjustment position.
The Halton URH exhaust valve is mounted with the aid of a separate installation frame LF, GF or DF. Push the installation frame into the duct and fix it. Push the valve into the installation frame and turn until it is firmly attached.
Alternatively model URH/B can be installed directly into a duct without an installation frame.
Installation with protection ring (CS)
The Halton URH valve is adjusted by rotating the central cone. Measure the opening (A) position (in mm) of the central cone. Set a probe inside the valve and measure the differential pressure with a manometer. The airflow rate is calculated using the formula below. After the adjustment, lock the central cone with the locking nut.
1. Central cone
2. Locking nut
Loosen the valve from the ductwork by turning counter-clockwise. Note the adjusted opening position of the central cone.
Wipe the parts with a damp cloth, instead of immersing in water. Reassemble valve in reverse order after cleaning.
The exhaust valve shall have an adjustable central cone and sleeve made of painted steel, with a white (RAL 9010) standard colour. The valve shall be fitted with a galvanised steel installation frame. The installation frame shall incorporate a sealing gasket.
Alternative: The valve shall be fixed with springs directly into a duct.
The opening position of the central cone shall be adjusted during balancing in order to achieve required pressure loss and airflow rate. After balancing the central cone shall be locked to the selected adjustment position.
Order Code ▲
S = Model
B With fastening springs
D = Connection size
100, 125, 160, 200
Other options and accessories
CO = Colour
W White (RAL 9010)
X Special colour
ZT = Tailored product
CS Cover plate (ULA)
EP Extension part
DF Installation frame for duct parts
GF Installation frame with gasket
LF Installation frame without gasket
URH/A-100, CO=W, ZT=N