• 

• 

Request a Quote

Model: NZJ

Cast Basalt Lined Wear-Resistant Throttle Valve

• Nominal Diameter: DN80-DN1000
• Pressure Rating: PN1.0-PN10.0 MPa
• Flange End: GB/T 9124, ANSI B16.5
• Suitable Media: Ash, Slurry, etc.
• Operating Temperature: -60 to 400℃
• Method of Operation: Manual, Electric, Pneumatic, Hydraulic
• Inspection & Testing: GB/T 13927, API 598

The cast basalt lined wear-resistant throttle valve is developed for abrasive slurry and ash handling systems where conventional throttling valves are exposed to severe wear and unstable service life. The valve uses fused cast basalt lining in key flow areas together with hydrolysis-resistant high-wear alloy cast steel valve plates. This combination delivers wear resistance more than ten times higher than conventional metal valves, helping reduce replacement frequency in abrasive conveying systems.

• Optimized wear-resistant structure
  The valve adopts a composite wear-resistant structure with ring-shaped cast basalt lining and alloy wear-resistant layers integrated inside the valve body. Its straight-through flow channel design allows media to discharge more smoothly after throttling, helping reduce turbulence and internal erosion caused by abrasive flow.
• Wide operating range
  Suitable for working pressures from 1.0–6.3 MPa and temperatures ranging from -40°C to 400°C. Nominal sizes can be customized from DN50 to DN1000. The valve is available with manual, electric, or pneumatic actuation methods for slurry, ash handling, and other demanding conveying applications.

• Ash handling and slag discharge systems in the power industry
  In hydraulic ash handling systems used in thermal power plants, the valve is suitable for high-concentration slag slurry conveying conditions with an ash-water ratio of 1:3. It can replace conventional Y-type throttle valves, delivering significantly longer service life while helping reduce shutdowns and maintenance costs caused by wear-related failures.
• Mine tailings handling systems
  The valve is suitable for transporting slurry and slag-water mixtures in mine tailings discharge systems. The fused cast basalt lining provides strong acid and alkali corrosion resistance, while the alloy throttle plate helps withstand continuous particle abrasion, supporting more stable flow regulation in high-solid-content conveying pipelines.

No.	Component	Material	Quantity
1	Connecting Flange	WCB	1
2	Deep Groove Ball Bearing		1
3	Single Direction Thrust Ball Bearing		2
4	Bearing Housing	WCB	1
5	Stem Assembly	45#	1
6	Support Plate	Q235	2
7	Packing Gland	WCB	1
8	Gland Packing		N
9	Stem Seal Ring	PU	1
10	Bonnet	WCB	1
11	Gate	Cr25	1
12	Left Body	WCB	1
13	Wear Sleeve	Cr25	1
14	Right Body	WCB	1

PN1.0MPa

Size		L	D	K	n-Ø	a	H
							Electric Operated	Manual Operated
DN	NPS	mm	mm	mm	mm	mm	mm	mm
80	3"	190	200	160	8-18	132	760	480
100	4"	206	220	180	8-18	156	800	520
125	5"	240	250	210	8-18	184	840	560
150	6"	260	285	240	8-22	211	920	610
175	7"	270	315	270	8-22	240	990	680
200	8"	280	340	295	8-22	266	1050	730
225	9"	310	370	325	8-23	295	1250	830
250	10"	290	395	350	12-22	319	1270	850
300	12"	368	445	400	12-22	370	1520	1090
350	14"	356	505	460	16-22	429	1580	1150
400	16"	384	565	515	16-26	480	1720	1280
450	18"	420	615	565	20-26	530	1900	1460
500	20"	474	670	620	20-26	582	2110	1660
600	24"	560	780	725	20-30	682	2480	2030
700	28"	550	895	840	24-30	794	2100	1800

PN1.6MPa

Size		L	D	K	n-Ø	a	H
							Electric Operated	Manual Operated
DN	NPS	mm	mm	mm	mm	mm	mm	mm
80	3"	190	200	160	8-18	132	760	480
100	4"	206	220	180	8-18	156	800	520
125	5"	240	250	210	8-18	184	840	560
150	6"	260	285	240	8-22	211	920	610
175	7"	270	315	270	8-22	240	990	680
200	8"	280	340	295	12-22	266	1050	730
225	9"	310	370	325	12-22	295	1250	830
250	10"	290	405	355	12-26	319	1270	850
300	12"	368	460	410	12-26	370	1520	1090
350	14"	356	520	470	16-26	429	1580	1150
400	16"	384	580	525	16-30	480	1720	1280
450	18"	420	640	585	20-30	548	1900	1460
500	20"	474	715	650	20-33	609	2110	1660
600	24"	560	840	770	20-36	720	2480	2030
700	28"	550	910	840	24-36	794	2100	1800

PN2.5MPa

Size		L	D	K	n-Ø	a	H
							Electric Operated	Manual Operated
DN	NPS	mm	mm	mm	mm	mm	mm	mm
80	3"	190	200	160	8-18	132	760	480
100	4"	206	235	190	8-22	156	800	520
125	5"	240	270	220	8-26	184	840	560
150	6"	260	300	250	8-26	211	920	610
175	7"	270	330	280	12-26	248	990	680
200	8"	280	360	310	12-26	274	1050	730
225	9"	310	395	340	12-30	302	1250	830
250	10"	290	425	370	12-30	330	1270	850
300	12"	368	485	430	16-30	389	1520	1090
350	14"	356	555	490	16-33	448	1580	1150
400	16"	384	620	550	16-36	503	1720	1280
450	18"	420	670	600	20-36	548	1900	1460
500	20"	474	730	660	20-36	609	2110	1660
600	24"	560	845	770	20-39	720	2480	2030
700	28"	550	960	875	24-42	820	2100	1800

PN4.0MPa

Size		L	D	K	n-Ø	a	H
							Electric Operated	Manual Operated
DN	NPS	mm	mm	mm	mm	mm	mm	mm
80	3"	250	200	160	8-18	132	780	500
100	4"	270	235	190	8-22	156	820	540
125	5"	310	270	220	8-26	184	860	580
150	6"	340	300	250	8-26	211	920	630
175	7"	355	350	295	12-30	258	990	733
200	8"	370	375	320	12-30	284	1050	750
225	9"	390	420	355	12-33	315	1270	850
250	10"	400	450	385	12-33	345	1290	870
300	12"	420	515	450	16-33	409	1550	1120
350	14"	495	580	510	16-36	465	1610	1180
400	16"	534	660	585	16-39	535	1750	1310
450	18"	580	685	610	20-39	560	1930	1490
500	20"	630	755	670	20-42	615	1850	1600
600	24"	730	890	795	20-48	735	2500	2200

PN6.3MPa

Size		L	D	K	n-Ø	a	H
							Electric Operated	Manual Operated
DN	NPS	mm	mm	mm	mm	mm	mm	mm
80	3"	250	215	170	8-22	140	780	500
100	4"	270	250	200	8-26	168	820	540
125	5"	310	295	240	8-30	202	860	580
150	6"	340	345	280	8-33	240	920	630
175	7"	355	375	310	12-33	270	990	700
200	8"	370	415	345	12-36	300	1050	750
225	9"	390	440	370	12-36	325	1270	850
250	10"	400	470	400	12-36	352	1290	870
300	12"	420	530	460	16-36	412	1550	1120
350	14"	495	600	525	16-39	475	1610	1180
400	16"	580	670	585	16-42	525	1750	1310

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.