DN750 EPDM Seat DSS 2205 Lug Butterfly Valve

Size Range: DN50-DN2000

Pressure Rating:PN6 / PN10 / PN16 / 150LB

Body: Ductile Iron(GGG40/50)

Disc: CF8M, Stainless Steel 316

Seat: PTFE

Actuator: Worm Gear

Sample: available

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Description

Basic Info of DSS 2205 Lug Butterfly Valve

DSS: It refers to Duplex Stainless Steel, DSS2205 ≈ 1.4462. Compared to the commonly used 316, 2205 has higher yield strength, tensile strength, and corrosion resistance.

2205 Valve Disc: Excellent resistance to chloride corrosion, pitting, and stress corrosion cracking, suitable for harsh industrial applications.

Ductile Cast Iron Body: Provides high mechanical strength and impact resistance while maintaining valve economy.

EPDM Rigid Backed Seat: Rigid metal backing design prevents seat deformation under pressure.

Lug Design: Provides a more robust connection, withstanding bolt tension, flange clamping force, and pipeline vibration loads.

Lug body + rigid backed seat allows for installation at the end of the pipeline, enabling maintenance of downstream equipment without shutting down the entire system.

Airtight Seal: Soft seal design achieves zero visible leakage. Ideal for isolation applications requiring reliable sealing.

Lug Butterfly Valve Parts Options

Parts	Ductile Iron type	WCB type	Stainless Steel Type	Duplex Stainless Steel Type
Body	Cast Iron(GG25) Ductile Iron(GGG40/50)	A216 A217 A105(forged)	SS304/ CF8 SS316/CF8M SS304L/CF3 SS316L/CF3M	2205 2507 1.4529
Disc	Ductile Iron with Ni coated Ductile Iron with nylon coated Ductile Iron with PTFE/EPDM lined Stainless Steel Duplex Stainless Steel Bronze		SS304/ CF8 SS316/CF8M SS304L/CF3 SS316L/CF3M 2205 2507 1.4529	2205 2507 1.4529
Seat	NBR, EPDM, PTFE, Viton, Hypalon, Silicon, PFA
Stem	SS416, SS431, SS304, SS316, Duplex Stainless Steel, Monel			Duplex Stainless Steel, Monel
Actuator	Hand Lever, Worm Gear, Electric, Pneumatic

Paraments of Lug Style Butterfly Valve

DN		A	B	C	D	L	D1	n-ø	K	E	4-ød	d0
mm	inch
50	2″	161	80	42	52.9	32	120	4-ø23	77	57.15	4-ø6.7	12.6
65	2.5″	175	89	44.7	64.5	32	136.2	4-ø26.5	77	57.15	4-ø6.7	12.6
80	3″	181	95	45.2	78.8	32	160	8-ø18	77	57.15	4-ø6.7	12.6
100	4″	200	114	52.1	104	32	185	4-ø24.5	92	69.85	4-ø10.3	15.77
125	5″	213	127	54.4	123.3	32	215	4-ø23	92	69.85	4-ø10.3	18.92
150	6″	226	139	55.8	155.6	32	238	4-ø25	92	69.85	4-ø10.3	18.92
200	8″	260	175	60.6	202.5	45	295	4-ø25	115	88.9	4-ø14.3	22.1
								/4-ø23
250	10″	292	203	65.6	250.5	45	357	4-ø29	115	88.9	4-ø14.3	28.45
300	12″	337	242	76.9	301.6	45	407	4-ø29	140	107.95	4-ø14.3	31.6
350	14″	368	267	76.5	333.3		467	4-ø30	140	107.95	4-ø14.3	31.6
400	16″	400	309	86.5	389.6	51.2	515	4-ø26	197	158.75	4-ø20.6	33.15
						/72	/525	/4-ø30
450	18″	422	328	105.6	440.51	51.2	565	4-ø26	197	158.75	4-ø20.6	38
						/72	/585	/4-ø30
500	20″	480	361	131.8	491.6	64.2	620	4-ø26	197	158.75	4-ø20.6	41.15
						/82	/650	/4-ø33
600	24″	562	459	152	592.5	70.2	725	20-ø30	276	215.9	4-ø22.2	50.65
						/82	/770	/20-ø36
700	28″	624	520	163	695	66	840	24-ø30	300	254	8-ø18	55/63.35
						/82		/20-ø36
800	32″	672	591	188	794.7	66	950	24-ø33	300	254	8-ø18	55/63.35
						/82		/24-ø39
900	36″	720	656	203	864.7	118	1050	24-ø33	300	254	8-ø18	75
1000	40″	800	721	216	965	142	1160	24-ø36	300	254	8-ø18	85