Soft Back Seat Nylon Coated Disc Wafer Butterfly Valve

TYPE NO.: ZCWFBV-02

Size Range: DN50-DN600

Pressure Rating:PN6 / PN10 / PN16 / 150LB

Body: Ductile Iron, (ggg50)

Disc: Stainless Steel(SS304/SS316/SS304L/SS316L/2205/2507)

Seat: Soft Seat（hard back）

Actuator:Hand Lever

Sample: available

Basic Info

The main difference between nylon coated disc soft back seat wafer butterfly valve and hard back seat wafer butterfly valve is the seat material:

1. Compared with the hard-backed valve seat, the soft-backed valve seat has a wider contact surface with the pipe flange, and the installation and sealing performance is better, without the need for a special flange for butterfly valves;
2. The soft-backed valve seat is highly replaceable and does not require any special tools. The replacement can be completed;
3. The wall thickness of the hard-backed valve body is relatively thin, and the valve body is easily deformed. The wall thickness of the soft-backed valve body is larger than that of the hard-backed valve body, and the valve body is heavier. The different shape designs prevent the valve body from deforming. Deformation.
4. The vulcanization process of the soft-backed valve seat is more perfect, and there will be no phenomenon of immature rubber of the hard-backed valve seat. The rubber performance is more reliable.
5. The soft-backed butterfly valve has small torque.
6. Nylon Coated disc butterfly valve: It has excellent friction reduction and self-lubricating properties. The operating torque is 40% lower than that of ordinary pinned butterfly valves.
7. Nylon Coated disc has excellent alkali and salt resistance, resistance to weak acid erosion, is inert to organic compounds, and has a wide range of adaptability

Part Name	Material/Method
Body	Ductile Iron, Casting Iron, WCB, LCB/LCC, Stainless Steel, Duplex Stainless Steel, Aluminium Bronze
Disc	Ductile Iron(Coated/Lined), WCB, LCB/LCC, Stainless Steel, Duplex Stainless Steel, Aluminium Bronze
Seat	PFA, Rubber(EPDM/NBR/VITON), Nature Rubber, Silicon Rubber, PU, HNBR, Hypalon
Stem	304, 316, 420(2Cr13), 431, 1.4462, 17-4PH, Monel
Actuator	Handlever, Worm Gear, Electric, Pneumatic

SIZE	øD	øD1	L	L1	H	H1	H2	ø2	ø3	4-ød1	T*T
DN25	55	33	26	29	30	122	48	50	65	7	11
DN40	65	43.1	33	36	30	139	70	50	65	7	11
DN50	82	53.08	42.5	46.1	30	140	60	70	90	10	11
DN65	94	64.82	45.6	49	30	150	67	70	90	10	11
DN80	111.2	79.04	45.6	48.4	30	160	87	70	90	10	11
DN100	140	104.04	52	56	30	180	105	70	90	10	11
DN125	166	123.3	56	60	30	190	118	70	90	10	14
DN150	187	155.68	56	60	30	210	130	70	90	10	14
DN200	246.8	201.9	60	64	35	235	166	102	125	12	17
DN250	301.5	250.45	68	72	35	270	197	102	125	12	22
DN300	352	301.55	78	83	35	305	231	102	125	12	22
DN350	390	333.8	78	83	35	360	255	125	150	14	22
DN400	452	389	102	106	50	381	293	140	175	18	27
DN450	510	439.2	114	118	50	425	325	140	175	18	27
DN500	564	491.4	127	132	50	470	363	140	175	18	36
DN600	651	579	153	159	60	565	425	165	210	22	36