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Model: DZF-Z

Abrasion Resistant Knife Gate Valve (Slurry Valve, L 55-95mm)

• 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

The abrasion resistant knife gate valve is designed for slurry systems exposed to severe wear, sediment accumulation, leakage, and valve blockage problems commonly found in mining backfill, mineral processing, tailings transport, tailings dewatering, cement slurry, ash handling, coal washing, sludge, and fly ash applications.
Conventional slurry gate valves used in these systems often suffer from poor sealing, material jamming, and short operating life. Based on years of experience in mining process control and valve wear research, SDPLDL developed the DZF-Z series slurry knife gate valve by combining the advantages of domestic and international slurry gate valve designs with an improved sealing and structural system.
The valve uses highly wear-resistant polyester materials in the flow passage and sealing areas, while its special self-cleaning structure helps reduce sediment buildup and material solidification at the bottom of the valve. The design achieves reliable sealing under both low- and high-pressure conditions, and its service life in slurry conveying systems can exceed that of conventional slurry gate valves by more than ten times.

• Integrated wear-resistant sealing structure:
  The valve seat, sealing areas, and flow passage components use one-piece wear-resistant polyester materials to improve durability and extend operating life in abrasive slurry systems.
• Self-cleaning sealing design:
  The contact area between the valve plate and seat uses a flexible self-flushing structure that helps reduce material accumulation and solidification at the bottom of the valve.
• High-strength valve stem:
  The stem is manufactured from stainless steel or alloy steel materials with heat treatment processing to improve strength and reduce the possibility of stem deformation during operation.
• Stainless steel structural components:
  The valve plate, bolts, and fastening components are manufactured from stainless steel for improved durability and corrosion resistance.

Suitable for slurry pipeline systems in mining operations, including cement slurry, ore slurry, slag slurry, coal slurry, tailings slurry, and settling tank slurry applications where wear resistance and stable sealing performance are required.

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	D0	N-M	N-Ø	H1 (Manual Operated)	H2 (Electric Operated)
DN	NPS	mm	mm	mm	mm	mm	mm	mm	mm
80	3"	55	200	160	240	2-M16	6-18	462	714
100	4"	55	220	180	240	2-M16	6-18	505	764
150	6"	60	285	240	300	2-M20	6-22	618	875
200	8"	70	340	295	300	4-M20	8-22	710	971
250	10"	70	405	355	400	4-M24	8-26	815	1159
300	12"	76	460	410	400	4-M24	8-26	1315	1267
350	14"	76	520	470	550	6-M24	10-26	1445	1372
400	16"	95	580	525	550	6-M27	10-30	1620	1524

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.