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Model: DZF-F

Wear-Resisting Knife Gate Valve (Large Diameter Slurry Valve, 80-500 mm)

• Nominal Diameter: DN80-DN500
• Pressure Rating: PN1.0-PN2.5 MPa
• Flange End: GB/T 9124, ANSI B16.5
• Suitable Media: Slurry
• Operating Temperature: -40 to 120℃
• Method of Operation: Manual, Electric, Pneumatic, Hydraulic
• Inspection & Testing: GB/T 13927, API 598

Slurry systems can be exposed to severe wear, sediment buildup, leakage, and valve blockage problems. The wear-resisting wafer knife gate valve is designed for such challenges commonly found in mining backfill, mineral processing, tailings transport, tailings dewatering, cement slurry, ash handling, coal washing, sludge, and fly ash applications.
Conventional slurry valves in these systems often suffer from incomplete sealing, material jamming, and short operating life. Based on years of experience in mining process control and valve wear analysis, SDPLDL developed the DZF-F series wear-resisting wafer knife gate valve by combining the advantages of international slurry gate valve designs with an optimized sealing and structural system.
The valve uses highly wear-resistant polyester materials in key flow and sealing areas. A tubular discharge groove is equipped in its bottom section that allows accumulated solids to be discharged periodically or continuously during operation. This reduces material buildup inside the valve considerably and improves long-term operating stability in slurry conveying systems. The valve achieves reliable sealing performance under both low- and high-pressure conditions, and its service life in slurry applications can exceed that of conventional slurry gate valves by more than ten times.

• Integrated wear-resistant flow components:
  The valve seat, sealing components, and flow passage areas use one-piece ultra wear-resistant polyester materials to improve durability and extend service life in abrasive slurry applications.
• Built-in discharge groove design:
  A tubular discharge groove at the bottom of the valve allows accumulated solids to be discharged periodically or continuously during operation, helping reduce sediment buildup inside the valve body.
• High-strength stem structure:
  The stem is manufactured from 2Cr13 material with heat treatment processing to improve strength and reduce the risk of deformation during operation.
• Corrosion-resistant metal components:
  The valve plate, bolts, and fastening components are manufactured from stainless steel for improved durability under demanding working conditions.

Suitable for slurry pipeline systems in mining operations, including cement slurry, ore slurry, slag slurry, coal slurry, tailings slurry, and settling tank slurry handling applications where severe wear and sediment buildup are common.

No.	Component	Material	Quantity
1	Bearing Housing	WCB	1
2	Stem	45#	1
3	Gate	304	1
4	Support Plate	Q235	2
5	Packing Gland	WCB	1
6	Gate Seal Block	Rubber	1
7	Body	WCB	1
8	Bushing	PU	2
9	Gasket	Rubber Sheet	1
10	Bottom Plate	Q235	1
11	Drain Pipe	Q235	1

PN1.6MPa

Size		L	D	D1	D2	D0	N-M	H1 (Manual Operated)	H2 (Electric Operated)
DN	NPS	mm	mm	mm	mm	mm	mm	mm	mm
80	3"	55	200	160	132	240	8-M16	380	660
100	4"	55	220	180	156	240	8-M16	460	740
150	6"	60	285	240	211	300	8-M20	550	830
200	8"	70	340	295	266	300	12-M20	650	920
250	10"	70	405	355	319	400	12-M24	730	1010
300	12"	76	460	410	370	400	12-M24	830	1158
350	14"	76	520	470	429	550	16-M24	910	1238
400	16"	82	580	525	480	550	16-M27	1020	1348

Note:
1. Valve drawings shown are for reference only.
2. Product specifications and technical data may change due to design improvements or product updates. Please contact our sales team for the latest information.
3. Custom designs and specifications are available upon request.