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Model: NH

Cast Basalt Wear-Resisting Check Valve (Non-Return Fused Cast Basalt Lined Valve)

Nominal Diameter: DN80-DN500

Pressure Rating: PN1.0-PN10.0 MPa

Flange End: GB/T 9124, ANSI B16.5

Suitable Media: Slurry, Ash Slurry, Oil, and Corrosive Media, etc.

Operating Temperature: -40 to 120℃

Method of Operation: Automatic, Pneumatic

Air Supply: PN0.3-PN0.7 MPa

Inspection & Testing: GB/T 13927, API 598

The cast basalt wear-resisting check valve solves the problems of rapid wear and sealing failure faced by conventional check valves for abrasive slurry and corrosive media systems. The slurry valve has cast basalt lining fused with an optimized valve structure, that delivers improved durability in demanding industrial environments such as mining, ash handling, and chemical processing.
The fused cast basalt lining offers excellent resistance to particle abrasion and corrosive media, making it suitable for high-solid-content applications including slurry and fly ash transport systems. With acid resistance exceeding 99%, the cast basalt lining helps the valve perform reliably in corrosive slurry and chemical processing environments while reducing wear caused by abrasive media. The triple-eccentric design of the valve reduces friction during operation. It helps minimize wear under abrasive working conditions and maintain reliable sealing performance that meets ANSI B16.104 Class VI sealing standards over extended operation.

• Mining industry
  The cast basalt wear-resisting check valve is widely used in high-concentration slurry conveying systems where severe particle abrasion can quickly damage conventional valves. Its fused cast basalt lining and tungsten carbide coating help resist continuous media erosion, while the ANSI B16.104 Class VI sealing standard helps reduce slurry leakage risks and maintain stable operation in mineral processing systems.
• Environmental engineering and wastewater treatment
  In sludge return systems used in wastewater treatment plants, the smooth surface of the cast basalt lining helps reduce flow resistance, contributing to lower system energy consumption and reduced maintenance frequency during long-term operation.

No.	Component	Material	Quantity
1	Bonnet	WCB	1
2	Body	WCB	1
3	Hinge Arm	WCB	1
4	Disc	WCB	1
5	Seal Ring	PU	1
6	Seal Retainer/Gland	WCB	1
7	Shaft Retaining Washer	Q235	1
8	Handwheel Assembly	WCB	1
9	Hinge Pin	40Cr	1
10	Shaft Plug	Q235	1

PN1.0MPa

Size		L	D	D1	D2	n-Ø	H
DN	NPS	mm	mm	mm	mm	mm	mm
80	3"	270	200	160	132	8-18	186
100	4"	320	220	180	156	8-18	216
125	5"	360	250	210	184	8-18	243
150	6"	365	285	240	211	8-22	276
175	7"	375	315	270	240	8-22	290
200	8"	380	340	295	266	8-22	302
225	9"	425	370	325	295	8-22	327
250	10"	460	395	350	319	12-22	355
300	12"	550	445	400	370	12-22	375
350	14"	610	505	460	429	16-22	433
400	16"	700	565	515	480	16-26	472
450	18"	780	615	565	530	20-26	520
500	20"	860	670	620	582	20-26	560

PN1.6MPa

Size		L	D	D1	D2	n-Ø	H
DN	NPS	mm	mm	mm	mm	mm	mm
80	3"	270	200	160	132	8-18	186
100	4"	320	220	180	156	8-18	216
125	5"	360	250	210	184	8-18	243
150	6"	365	285	240	211	8-22	276
175	7"	375	315	270	240	8-22	290
200	8"	380	340	295	266	12-22	302
225	9"	425	370	325	295	12-22	327
250	10"	460	405	355	319	12-26	355
300	12"	550	460	410	370	12-26	375
350	14"	610	520	470	429	16-26	433
400	16"	700	580	525	480	16-30	472
450	18"	780	640	585	548	20-30	520
500	20"	860	715	650	609	20-33	560

PN2.5MPa

Size		L	D	D1	D2	n-Ø	H
DN	NPS	mm	mm	mm	mm	mm	mm
80	3"	270	200	160	132	8-18	186
100	4"	320	235	190	156	8-22	216
125	5"	360	270	220	184	8-26	243
150	6"	365	300	250	211	8-26	276
175	7"	375	330	280	248	12-26	290
200	8"	380	360	310	274	12-26	302
225	9"	425	395	340	302	12-30	327
250	10"	460	425	370	330	12-30	355
300	12"	550	485	430	389	16-30	375
350	14"	610	555	490	448	16-33	433
400	16"	700	620	550	503	16-36	472
450	18"	780	670	600	548	20-36	520
500	20"	860	730	660	609	20-36	560
600	24"	1050	845	770	720	20-39	650

PN4.0MPa

Size		L	D	D1	D2	n-Ø	H
DN	NPS	mm	mm	mm	mm	mm	mm
80	3"	306	200	160	132	8-18	207
100	4"	330	235	190	156	8-22	266
125	5"	370	270	220	184	8-26	285
150	6"	390	300	250	211	8-26	315
175	7"	430	350	295	258	12-30	340
200	8"	440	375	320	284	12-30	360
225	9"	470	420	355	315	12-33	378
250	10"	520	450	385	345	12-33	410
300	12"	610	515	450	409	16-33	435
350	14"	660	580	510	465	16-36	493
400	16"	750	660	585	535	16-39	535
450	18"	800	685	610	560	20-39	590

PN6.3MPa

Size		L	D	D1	D2	n-Ø	H
DN	NPS	mm	mm	mm	mm	mm	mm
80	3"	306	215	170	140	8-22	207
100	4"	330	250	200	168	8-25	266
125	5"	370	295	240	202	8-30	285
150	6"	390	345	280	240	8-33	315
175	7"	430	375	310	270	12-33	340
200	8"	440	415	345	300	12-33	360
225	9"	470	440	370	325	12-33	378
250	10"	520	470	400	352	12-39	410
300	12"	610	530	460	412	16-39	435
350	14"	660	600	525	465	16-39	493
400	16"	750	670	585	535	16-42	535

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.