Wafer Centric Butterfly Valve with EPDM Seat

Nominal Diameter: DN50‑DN1200 (2″‑48″)
Pressure Rating: PN10‑PN16 (Class 150LB)
Operation: Handwheel, Worm‑gear
Body Material: QT450, HT200, WCB, 304, 316L, 2507
Seat Material: NBR, EPDM, NR, CR, FPM, PTFE
Design & Manufacture Standard: GB/T12238‑2008, ISO 10631‑1994, BS EN 593‑2004, MSS‑SP‑67, API 609
Connection Type: Wafer
Temperature Range: ‑29°C‑180°C (Subject to body and seat materials)
Applicable Media: Water, cooling water, sewage, rainwater, circulating water, seawater, mild acid‑alkali fluids, salt water, air, gas, syrup, wine

Product details

The centric soft‑seated wafer butterfly valve is a butterfly valve with concentric‑seated construction, soft‑seal seat and wafer‑type connection. It mainly consists of valve body, butterfly disc, stem, seat and actuator.

The butterfly disc is positioned at the center of the pipeline. Rotation of the disc driven by the valve stem realizes opening, shut‑off and flow regulation of the medium. With wafer‑type design, the valve features light weight, compact structure and small installation space, making it suitable for medium‑low pressure piping systems.

Working Principle of Centric‑Seated Butterfly Valve：
Valve Opening: The hand lever, worm‑gear or actuator drives the valve stem to rotate, and the butterfly disc opens gradually. When the butterfly disc turns to a position nearly parallel to the pipeline axis, the valve is fully open and the medium can flow through unobstructed.

Valve Closing: Drive the valve stem in the reverse direction to rotate the butterfly disc until it is perpendicular to the pipeline axis. The outer edge of the disc comes into full contact with the soft‑seated seat. A tight seal is formed by the elastic pre‑tension force of the seat, shutting off the flow of medium.

Product Specifications

Manual butterfly valves are widely used in industrial piping systems for fast and reliable flow isolation and regulation. Key parameters including working temperature, medium, pressure rating, valve size and connection standard should be confirmed before ordering for proper valve selection. Customized valve sizes, pressure ratings, connection types, sealing materials and body materials are available for diverse industrial and non-standard applications. (Unit: mm)

Concentric Soft-Seated Wafer Butterfly Valve – PN10-PN16

DN	NPS	Type/Class	Part No	L	L1	D	D1	D2	D3	D4	d	H1	H2	H3
50	2	Q371-PN10	Q371P10XLX2	42	160	52.9	125	92	77	57	12.6	70	147	60
65	2.5	Q371-PN10	Q371P10XLX2.5	44.7	160	64.5	145	110	77	57	12.6	76	155	60
80	3	Q371-PN10	Q371P10XLX3	45.2	160	78.8	160	121	77	57	12.6	92	164	60
100	4	Q371-PN10	Q371P10XLX4	52.1	160	104	180	153	92	70	15.78	106	175	60
125	5	Q371-PN10	Q371P10XLX5	54.4	160	123.3	210	176	92	70	18.92	119	194	60
150	6	Q371-PN10	Q371P10XLX6	55.8	160	155.6	240	207	92	70	18.92	132	206	60
200	8	Q371-PN10	Q371P10XLX8	60.6	210	202.5	295	259	115	89	22.1	162	237	72
250	10	Q371-PN10	Q371P10XLX10	65.6	210	250.5	350	316	115	89	28.45	200	282	72
300	12	Q371-PN10	Q371P10XLX12	77	210	301.6	400	370	140	108	31.6	225	311	75
350	14	Q371-PN10	Q371P10XLX14	76.5	210	333.3	460	405	140	108	31.6	263	335	75
400	16	Q371-PN10	Q371P10XLX16	86.5	320	389.6	515	470	197	159	33.15	309	400	126
450	18	Q371-PN10	Q371P10XLX18	105.6	320	440.5	565	522	197	159	38	328	420	126
500	20	Q371-PN10	Q371P10XLX20	132	320	491.6	620	566	197	159	41.15	361	480	126
600	24	Q371-PN10	Q371P10XLX24	152	340	592.5	725	693	276	216	50.65	459	560	127
700	28	Q371-PN10	Q371P10XLX28	163	380	695	840	801	300	254	63.5	520	624	167
800	32	Q371-PN10	Q371P10XLX32	188	380	794.7	950	907	300	254	63.5	590	680	167
900	36	Q371-PN10	Q371P10XLX36	203	400	864.7	1050	1016	300	254	75	656	720	193
1000	40	Q371-PN10	Q371P10XLX40	216	400	965	1160	1123	300	254	85	720	800	193
1200	48	Q371-PN10	Q371P10XLX48	276	450	1158	1380	1455	350	298	105	844	941	/
50	2	Q371-PN16	Q371P16XLX2	42	160	52.9	125	92	77	57	12.6	70	147	60
65	2.5	Q371-PN16	Q371P16XLX2.5	44.7	160	64.5	145	110	77	57	12.6	76	155	60
80	3	Q371-PN16	Q371P16XLX3	45.2	160	78.8	160	121	77	57	12.6	92	164	60
100	4	Q371-PN16	Q371P16XLX4	52.1	160	104	180	153	92	70	15.78	106	175	60
125	5	Q371-PN16	Q371P16XLX5	54.4	160	123.3	210	176	92	70	18.92	119	194	60
150	6	Q371-PN16	Q371P16XLX6	55.8	160	155.6	240	207	92	70	18.92	132	206	60
200	8	Q371-PN16	Q371P16XLX8	60.6	210	202.5	295	259	115	89	22.1	162	237	72
250	10	Q371-PN16	Q371P16XLX10	65.6	210	250.5	355	316	115	89	28.45	200	282	72
300	12	Q371-PN16	Q371P16XLX12	77	210	301.6	410	370	140	108	31.6	225	311	75
350	14	Q371-PN16	Q371P16XLX14	76.5	210	333.3	470	405	140	108	31.6	263	335	75
400	16	Q371-PN16	Q371P16XLX16	86.5	320	389.6	525	470	197	159	33.15	309	400	126
450	18	Q371-PN16	Q371P16XLX18	105.6	320	440.5	585	522	197	159	38	328	420	126
500	20	Q371-PN16	Q371P16XLX20	132	320	491.6	650	566	197	159	41.15	361	480	126
600	24	Q371-PN16	Q371P16XLX24	152	340	592.5	770	693	276	216	50.65	459	560	127
700	28	Q371-PN16	Q371P16XLX28	163	380	695	840	801	300	254	63.5	520	624	167
800	32	Q371-PN16	Q371P16XLX32	188	380	794.7	950	907	300	254	63.5	590	680	167
900	36	Q371-PN16	Q371P16XLX36	203	400	864.7	1050	1016	300	254	75	656	720	193
1000	40	Q371-PN16	Q371P16XLX40	216	400	965	1170	1123	300	254	85	720	800	193
1200	48	Q371-PN16	Q371P16XLX48	276	450	1158	1390	1455	350	298	105	844	941	/

Featuring concentric centric‑seated structure, the valve delivers low operating torque for easy operation. The rubber soft‑seat provides excellent sealing performance with zero‑leakage shut‑off. Its compact wafer‑type design reduces size and weight to save installation space. It offers unobstructed flow passage, low flow resistance and high‑flow capacity. Multiple actuators including manual, pneumatic and electric are available. Easy‑to‑disassemble construction simplifies later‑stage maintenance. Cost‑effective, it is well‑suited for large‑scale water‑system working conditions.

Wafer Centric Butterfly Valve with EPDM Seat

Product details

Product Specifications

Concentric Soft-Seated Wafer Butterfly Valve – PN10-PN16

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