Convex Ear Spy Lug Butterfly Valve Ductile Iron Stainless Steel for Water Wastewater HVAC Chemical China Manufacturer

Convex Ear Spy Valve

The convex ear butterfly valve is a type of midline butterfly valve, which is designed with external convex ear structures on both sides of the valve body. It is fixed to the pipeline flange by bolts passing through the convex ears, and has the characteristics of compact structure and easy disassembly and assembly. Its advantages include:

Bidirectional sealing, suitable for media such as water and gas, pressure rating ≤ PN16, temperature range -20 ℃~150 ℃;

No bracket design, the valve shaft is directly embedded in the valve body, reducing leakage points and low maintenance costs;

Suitable for clip on installation, especially for pipeline systems that require frequent maintenance such as fire protection, water supply and drainage.

Get a quote

Diversified driving and intelligent control
Corrosion resistance and wear resistance
Lightweight and compact structure
Multiple sealing performance
Convenient protruding ear connection method
Design of low flow resistance valve plate

Diversified driving and intelligent control

Diversified driving and intelligent control
01
Supports manual, worm gear, pneumatic or electric drive, with small operating torque and fast opening and closing speed (90 ° rotation to complete the switch);
02
Some models are equipped with intelligent pneumatic actuators that support remote control and fault diagnosis, and are compatible with automated industrial systems.

Corrosion resistance and wear resistance

Corrosion resistance and wear resistance
01
The valve body and valve plate can be made of stainless steel (SS316L), heat-resistant alloy and other materials, and the surface can be sprayed with epoxy resin coating to adapt to humid and corrosive environments;
02
The contact surface of the valve plate is treated with hard alloy or ceramic to improve wear resistance and extend service life.

Lightweight and compact structure

Lightweight and compact structure
01
The valve body is welded with short structural steel plates or high-strength cast iron, which is lightweight and small in size, suitable for space limited scenarios such as ships and high-altitude pipelines;
02
No bracket design, the valve shaft is directly embedded in the valve body, reducing leakage points and lowering maintenance difficulty.

Multiple sealing performance

Multiple sealing performance
01
The sealing ring is made of PTFE or metal material, combined with rubber and metal composite sealing layer, which can withstand high temperature (≤ 300 ℃) and corrosive media;
02
The triple sealing structure (such as double-layer soft seal+metal seal) ensures reliable sealing under low to medium pressure (PN6-PN16) conditions.

Convenient protruding ear connection method

Convenient protruding ear connection method
01
The clamp type flange connection is fixed by bolts penetrating through the protruding ears, and installation does not require welding to avoid thermal deformation of the pipeline and ensure system strength;
02
The protruding ear provides two forms of through-hole (type A) or internally threaded hole (type LT) to adapt to different bolt length requirements and enhance installation flexibility.

Design of low flow resistance valve plate

Design of low flow resistance valve plate
01
Adopting a disc-shaped valve plate that is parallel to the pipeline when opened, significantly reducing fluid resistance and pressure loss, suitable for long-distance or pressure sensitive systems (such as petrochemical raw material transportation);
02
Double eccentric or triple eccentric structure optimizes the opening and closing trajectory, reduces friction between the valve plate and valve seat, and extends the sealing life.

Main Component Materials

Part Name	material
valve body	WCB, CF8, CF3, CF3M, CF8M, 22052507, WC6, LCB, C95800, etc
butterfly valve disc	WCB, CF8, CF3, CF3M, CF8M, 22052507, WC6, LCB, C95800, etc
sealing ring	SS304+graphite, SS316+graphite, SS316L+graphite, S31803+graphite PTFE, RPTFE, PPL, EPDM, NBR, etc
valve stem	F6a, F304, F304L, F316, F316L, F51, F53, MonelK400/500, 17-4PH, etc
bushing	SF-1, SF-1B, SS304, SS316, SS304+PTFE, SS316+PTFE, etc
filler	Graphite, PTFE, PPL, etc

Performance Specifications & Dimensions

Nominal pressure PN

0.6/1.0/1.6/2.5/4.0/6.4
Shell F

P x 1.5
Sealing Pressure

P x 1.1
Medium

Air, water, steam, coal gas, oil products, as well as acids, alkalis, salts with weak corrosive media, etc
Temperature (℃)

Carbon steel: -29 ℃~425 ℃/Stainless steel: -100 ℃~800 ℃

Nominal diameter DN (mm)	structural length		PNO.6MPa		PN1.0MPa		PN1.6MPa		PN2.5MPa
Nominal diameter DN (mm)	L1	L2	D1	Z-Md	D1	Z-Md	D1	Z-Md	D1	Z-Md
50	43		110	4-M12	125	4-M16	125	4-M16	125	4-M16
65	46		130	4-M12	145	8-M16	145	8-M16	145	8-M16
80	49	64	150	4-M16	160	8-M16	160	8-M16	160	8-M16
100	56	64	170	4-M16	180	8-M16	180	8-M16	190	8-M20
125	64	70	200	8-M16	210	8-M16	210	8-M16	220	8-M24
150	70	76	225	8-M16	240	8-M20	240	8-M20	250	8-M24
200	71	89	280	8-M16	295	8-M20	295	12-M20	310	12-M24
250	76	114	335	12-M16	350	12-M20	355	12-M24	370	12-M27
300	83	114	395	12-M20	400	12-M20	410	12-M24	430	16-M27
350	92	127	445	12-M20	460	16-M20	470	16-M24	490	16-M30
400	102	140	495	16-M20	515	16-M24	525	16-M27	550	16-M33
450	114	152	550	16-M20	565	20-M24	585	20-M27	600	20-M33
500	127	152	600	20-M20	620	20-M24	650	20-M30	660	20-M33
600	154	178	705	20-M24	725	20-M27	770	20-M33	770	20-M36
700	165	229	810	24-M24	840	24-M27	840	24-M33	875	24-M39
800	190	241	920	24-M27	950	24-M30	950	24-M36	990	24-M45
900	203	241	1020	24-M27	1050	28-M30	1050	28-M36	1090	28-M45
1000	216	300	1120	28-M27	1160	28-M33	1170	28-M39	1210	28-M52
1200	254	360	1340	32-M30	1380	32-M36	1390	32-M45	1420	32-M52
1400	279	390	1560	36-M33	1590	36-M39	1590	36-M45
1600	318	440	1760	40-M33	1820	40-M45	1820	40-M52
1800	356	490	1970	44-M36	2020	44-M45	2020	44-M52
2000	406	540	2180	48-M39	2230	48-M45	2230	48-M56

Note: The pressure range is 0.6MPa~6.4MPa. The above data is for reference only. Please consult the company's sales department for details.

Valve Application

Oil & Gas Transportation

Oil and gas transportation involves multiple modes such as pipelines and ships, and is the core link of the energy supply chain.
Chemical Raw Material Control

The control of chemical raw materials covers the entire process of mining, storage, and production, ensuring safety and process stability.
High Temperature SteamPipeline in Power System

High temperature steam pipelines are the core of energy transmission in power systems, supporting the efficient operation of thermal and nuclear power plants.
Other Industries

Valves control fluids in multiple industries such as new energy and electronics, ensuring safe and efficient production.