Lug butterfly valve is a type of quarter-turn butterfly valve lug type that is ideal for regulating the flow of liquids or gases in industrial applications. It consists of a circular disc that rotates around a central axis within a pipe, controlling the flow of the medium. We offer a wide range of lug style butterfly valve designed for various industrial applications. Our lug valves are constructed using high-quality materials and meet industry standards such as ISO and API. Our lug type butterfly valve come in various sizes, materials, and configurations, including manual, electric, or pneumatic actuation. The valve’s lug design ensures easy installation and removal, making the lug style butterfly valve ideal for piping systems that need regular maintenance.
Our lugged butterfly valve provides multiple advantages through its precise flow control mechanism and low operating torque and affordable installation costs. The lug valve design makes them suitable for applications that need bidirectional flow control or have limited space requirements. Our team of experts collaborates with reliable suppliers to obtain premium materials which we use to construct our butterfly valve lug type. Pov’s dedication to quality results in semi lug butterfly valves that operate easily while lasting long to deliver peak performance and productivity.
FEATURES
1,ISO5211 top flange together with stem square suitable for direct mounting of actuators
2,Stem anti-blowout design keep safety in field use
3,Dirtscraper prevents moisture penetrating into the shaft area
4,Suitable for high pressure and full vacuum service due to the use of a cartridge seat design
5,Full rated unidirectional dead-end service is achieved by a lip designed in the lug body
6,No exposed pins or bolts for stem-to-disc connection
7,No need for flange gaskets
8,No risk of damage to the lug type butterfly valve during installation in closed position
9,Bubble-tight shut of at full pressure rating
10,Large flow capacity and enough strength because of streamline disc design
11,Plug with O-ring sealing eliminates any leakage from the stem
PARTS LIST AND MATERIAL SPECIFICATION
TECHNICAL DATA
Body style
Lug
Nominal diameter
2″ – 80″ (DN50mm – DN2000mm)
Top flange
ISO5211
Operating pressure
16bar for DN50-DN300, 10bar for DN350-DN2200
Temperature range
-20 °C to + 140 °C (depending on pressure, medium and material)
Flange accommodation
EN 1092 PN 6/PN10/PN16
ASME Class 150
AS 4087 PN10/ PN16
JIS 5K/10K
Applications
Potable Water, Wastewater, Seawater, HVAC
Operation
Hand lever, gear box, pneumatic actuator, electric actuator
DIMENSIONS (mm)
SIZE
A
B
C
D
E
F
d
G
H
J
L
WT(kg)
DN
INCH
50
2″
126
78
13.5
117
9
50
8
70
31
34
43
2.8
65
2 1/2″
134
84
13.5
131
9
50
8
70
45
36
46
3.7
80
3″
138
92
13.5
176
9
50
8
70
64
36
46
5.1
100
4″
167
114
13.5
206
11
70
10
90
91
40
52
6.9
125
5″
180
129
17.5
236
14
70
10
90
110
44
56
9.3
150
6″
203
144
17.5
258
14
70
10
90
146
44
56
10.5
200
8″
228
179
24.5
321
17
102
12
125
193
50
60
17.4
250
10″
266
216
25
395
22
102
12
125
241
57
68
28.1
300
12″
291
247
25
461
22
102
12
125
292
66
78
40
350
14″
332
273
30
511
27
125
14
150
329
62
78
55
400
16″
363
317
30
580
27
125
14
150
376
84
102
85
450
18″
397
348
39
630
36
140
18
175
425
94
114
114
500
20″
425
393
39
700
36
140
18
175
475
110
127
144
600
24″
498
453
49
823
46
165
22
210
573
120
154
227
700
28″
626
531
90
928
63.1
254
18
300
674
54
165
342
750
30″
660
564
90
984
63.1
254
18
300
727
54
165
400
800
32″
666
601
90
1061
63.1
254
18
300
771
60
190
485
900
36″
722
660
110
1170
74.7
254
18
300
839
60
203
605
1000
40″
806
728
120
1290
83.7
298
22
350
939
60
216
776
1100
44″
826
771
140
1404
94.7
298
22
350
1036
50
255
985
1200
48″
941
874
150
1511
104.7
298
22
350
1137
62
276
1190
1400
56″
1000
940
175
1685
139.9
356
32
415
1351
62
279
1380
1600
64″
1155
1085
195
1930
160
356
32
415
1548
65
318
2054
1800
72″
1200
1170
195
2170
174.5
406
39
475
1703
70
356
3075
2000
80″
1363
1360
245
2345
199
406
39
475
1938
75
406
4500
FAQs
What is a lug style butterfly valves?
A lug style butterfly valve is a type of valve that uses a circular disc to control the flow of liquids or gases. It has two halves and is opened and closed by turning the disc around its axis. The main parts are a body, disk, stem, actuator, bonnet, seat ring and mounting lugs.
The most important feature of this type of valve is its lug style design which allows for easy assembly and installation in tight spaces. Lug style butterfly valves can be used in both linear (on/off) applications as well as those requiring throttling (partial closure) such as regulating water pressure or controlling steam temperature/pressure. They also have good bi-directional operation capabilities meaning they can be used in either direction without any flow restrictions due to disk alignment issues. For this reason, they are often found on high-pressure systems where other types of valves may not perform adequately.
In terms of construction material choices for lug butterfly valves there are several options including cast iron, carbon steel bodies with stainless steel trim components; all stainless steel; iron body with bronze trim pieces; aluminum bodies with brass trim components; The choice will ultimately depend on the application requirements such as size requirements, media operating temperature/pressure ratings etc., cost considerations etc.
What are the advantages of a lug butterfly valves?
High Flow Rate: Lug butterfly valves are known for their excellent flow rate capacities, allowing them to move large amounts of fluid through pipelines quickly and efficiently without compromising pressure control. They can even be used as throttles when there is an increase in pressure or flow on one side of the line.
Reliability: The design and construction of lug butterfly valves ensures they will last longer than many other types of valves due to their lower number of parts and less complicated assembly processes which reduces chances for leakages or corrosion related problems caused by rusting components within the system.
Lug type butterfly valve installation?
You often choose a lug butterfly valve when you need strong support at the ends of your pipeline. This butterfly valve has threaded inserts, called lugs, around its body. You can bolt each side of the valve directly to the pipe flanges. This design lets you remove one side of the pipeline while the other side stays connected. You do not need to shut down the whole system for maintenance.
Lug vs wafer butterfly valve?
The evaluation of lug and wafer butterfly valves requires examination of several essential distinctions. Lug butterfly valves use flanged ends which enable users to connect them directly to pipe flanges through bolting. The installation process of lug butterfly valves takes less time and produces fewer leak points than traditional gate or globe valves. Wafer butterfly valve operate without additional components such as bolts or gaskets because they use clamps to secure themselves between two pieces of pipe.
