Furnace equipments products

GENERAL INFORMATION

Glass Service designed and fabricates an adjustable port air valve for control purposes. They are a dependable and accurate means of controlling the flow of air at variable pressure for any type of burner or system. The adjustable port feature permits sizing the valve to fit any application after it has been installed. Linkages can be adjusted for full or limited valve travel.

Flow control may be either manual or automatic. These valves are designed to be used as efficient control systems, installed in any position, but not as shutoff valves.

Internal parts of the valve can be cleaned or replaced without removing the valve from the pipeline.

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MATERIALS

The valve is composed of a cast iron shell with internal components in anticorodal aluminum
and self-lubricated bronze bushing. The design is completed with NBR gaskets.

GENERAL 3D VIEW

The mixer body and the mixing chamber are machined from a cast piece, while the insert is made of Aluminum Anticorodal.
The calibrated nozzle, made in brass, is also completely customizable.

Operating principle

Manual or automatic control is accomplished by moving the curtain adjusting knob and the core control shaft as shown in the diagram below.

The capacity of the air flow is determined by the height and width of the valve port opening in relation to the valve outlet.
The height of the port is controlled by the curtain adjusting knob. The width of the port is controlled by the core control shaft. Rotating this shaft proportionally uncovers the rectangular port in the valve body.

Rotating the curtain adjusting knob, the curtain moves back and forth, opening or closing the port.
Rotating the control shaft, the core rotates accordingly opening or closing the port.

Valve main dimensions

TYPE A B C D E F G H I L M N O P Q R
BODY B
M6
42
114.4
224
100
8
12
38
49
84
84
7
R6
42
M6
42
BODY C
M6
70
137
254
120
8
12
38.5
62
102
102
9
R6
50
M6
50
BODY D
M6
70
187.5
319
164
8
12
38.5
85
140
142
10.5
R6
80
M8
60

Main Features

The main features of the adjustable port air valve are:

  • Improved flow characteristics over butterfly valve design
  • Adjustable port for limiting the maximum flow rate
  • Control of the air flow at variable pressure for any type of burner or system
  • High reliability due to the cast iron construction
  • Orientation-free installation
  • Three body sizes for a wide working range
  • Easy disassembly for fast maintenance without removal from the pipeline
  • Adapts for direct connection or linked connection with actuators

Capacities

INSTALLATION

Glass Service adjustable port valve is equipped with tapped mounting pads to facilitate the installation of multiple control motors available in the market.

Levering kit is also supplied for connection with servomotors.

Mounting kit for in-line connection with servomotors.

Installing the Glass Service adjustable port valve is very easy and fast: just n°4 screws for each flange and the valve is ready to work.

Threading kit is also available to convert the flange connection to standard threaded connection.

CONNECTION KIT DIMENSIONS

VALVE SIZE A B C D E F G H I
B-DN40
64
64
7
84
84
76
10
27
G1”1/2
B-DN50
64
64
7
84
84
76
10
27
G2”
C-DN50
82
82
9
102
102
96
10
29.5
G2”
C-DN65
82
82
9
102
102
96
10
29.5
G2”1/2
C-DN80
82
82
9
102
102
96
10
40.5
G3”
D-DN80
114.5
114.5
10.5
142
140
136
10
39
G3”
D-DN100
114.5
114.5
10.5
142
140
136
10
39
G4”

Maintenance

Internal parts of the valve can be cleaned or replaced without removing the valve from the pipeline.

VIEW