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產品概述
此刀形閘閥是閘閥中的新品種，體積小，重量輕，輕型節材，是污水、煤漿、糖漿、泥漿、空氣、渣水混合物、供水、造紙、礦山等行業中的理想產品。
暗板刀型閘閥采用金屬對金屬的硬密封，或采用金屬對橡膠的軟密封。在開啟和關閉的過程中，閘板與密封面采用了特殊的設計，摩擦較少，經久耐用。
此種刀形閘的上密封突破了常規的密封形式，采用上蓋結構，使得上密封由大面積的矩形密封改成了小面積的圓周密封，密封性能大大提高。在圓周密封的基礎上，又采用了目前國際上*的浮動密封結構，使得上密封達到了與管道同壽命的程度，從而整體上提高了閥門的使用壽命。
此種閘閥在手輪頂部加裝封套裝置后，可以使閥門活動部件全部處于封閉狀態，閘板和閥桿的絲桿傳動不會因潤滑油干枯而卡澀。特別適合在粉塵及干燥的惡劣環境中長期正常工作。
注：可根據使用單位的環境和要求來設計與生產，適合用戶的安裝和使用。
鏈輪暗桿刀型閘閥傘齒輪的齒形是圓弧形狀，而且一般都是呈錐狀，像傘形，故名傘齒輪。傘齒輪傳動效率高，傳動比穩定，圓弧重疊系數大，承載能力高，傳動平穩平順，工作可靠，結構緊湊，節能省料，節省空間，耐磨損，壽命長，噪音小。
技術參數范圍
公稱壓力：0.6MPa、1.0MPa、1.6MPa、2.5MPa、150LB
公稱通徑：DN50mm~DN2000mm NPS 2"~80"
適用溫度：-38℃~1100℃（具體溫度范圍視密封副材質和介質性質而定）
連接法蘭：ANSI B16.5、GB/T9113、JB/T79、HG、SH、JIS、DIN、NF、BS
主體材料：C.I、WCB、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、CF8、CF8M、CF3、CF3M、2Cr25Ni20
密封形式：硬密封、軟密封
泄 漏 量：硬密封：D級（液體0.1×DNmm3/s）；軟密封：（零泄漏）
配套附件：安裝法蘭
Product introduction
This knife gate valve is a new generation gate valve characteristic of small construction, low weight, and high material utilization. It is an ideal product for such sectors including sewage disposal, coal slurry, syrup, sludge, air, slag-water mix, water supply, papermaking, mining, etc.
The knife gate valve adopts metal-to-metal hard sealing or metal-to-rubber soft sealing. In the processing of valve switching on/off, the gate plate and sealing face are provided with special design, featuring limited friction and high durability.
The sealing of the knife gate valve represents a breakthrough in traditional sealing form. Upper cap structure changes large area rectangular sealing face of the upper sealing to small area circular sealing, with much enhanced sealing performance. Based on circular sealing, the valve is further provided with latest floating sealing construction in the world. Thus the upper sealing shares the same useful life with pipeline, so the overall useful life of the valve increases.
After envelope is added to the top of hａnd wheel, all the moving parts of the gate valve will be enclosed. Therefore, the rotation of lead screws between gate plate and stem will not block because of short supply of lubricating oil. In particular, the valve is applicable for long-term service in severely dusty and dry environment.
Note: The valve could be designed and manufactured based on client's site conditions and requirements for better installation and application.
Chainwheel lidded knife gate valve of bevel gear tooth profile is arc shape, and are generally not cone shaped like a umbrella, therefore bevel gear. Bevel gear drive with high efficiency, stable transmission ratio, arc overlap coefficient is big, high bearing capacity, stable transmission smooth, reliable operation, compact structure, and energy saving material, saving space, wear resistance, long life and low noise.
Technical Parameter Range
Nominal pressure:0.6MPa、1.0MPa、1.6MPa、2.5MPa、150LB
Nominal diameter:DN50mm~DN2000mm NPS 2"~80"
Suitable temperature:-38℃~1100℃（Range of temperature subject to the material of sealing and property of medium）
Flange drilling:ANSI B16.5、GB/T9113、JB/T79、HG、SH、JIS、DIN、NF、BS
Main materials:C.I、WCB、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、CF8、CF8M、CF3、CF3M、2Cr25Ni20
Seal type:Stainless steel hard seal、Teflon soft seal
Leakage:Stainless steel hard seal:Grade D(Liquid0.1×DNmm3/s)、Teflon soft seal:Grade A(Zero Leakage)
Accessories:Flange

主要外形及連接尺寸Profile and connection dimension											單位Unit:mm
PN	DN	L	D	D1	D2	H	N-M	PN	DN	L	D	D1	D2	H	N-M
0.6	50	48	160	125	100	285	4-16	1.0	50	48	160	125	99	285	4-16
	65	48	180	145	120	298	4-16		65	48	185	145	120	298	4-16
	80	50	195	160	135	315	4-16		80	50	200	160	135	315	8-16
	100	50	215	180	155	365	8-16		100	50	220	180	155	365	8-16
	125	57	245	210	185	400	8-16		125	57	250	210	185	400	8-16
	150	57	280	240	210	475	8-20		150	57	285	240	210	475	8-20
	200	70	335	295	265	540	8-20		200	70	340	295	265	540	12-20
	250	70	390	350	320	630	12-20		250	70	405	355	310	630	12-22
	300	76	440	400	368	780	12-20		300	76	460	410	375	780	12-22
	350	76	500	460	428	885	16-20		350	76	520	470	435	885	16-22
	400	89	565	515	482	990	16-22		400	89	580	525	485	990	16-27
	450	89	615	565	532	1100	20-22		450	89	640	585	545	1100	20-27
	500	114	670	620	585	1200	20-22		500	114	715	650	609	1200	20-30
	600	114	780	725	685	1450	20-27		600	114	840	770	720	1450	20-36
	700	130	895	840	800	1700	24-27		700	130	910	840	788	1700	24-36
	800	130	1010	950	898	2000	24-30		800	130	1025	950	895	2000	24-36
	900	140	1110	1050	1005	2300	28-30		900	140	1125	1050	998	2300	28-36
	1000	216	1220	1160	1115	2500	28-30		1000	216	1255	1170	1110	2500	28-42
	1200	254	1450	1380	1325	2800	32-36		1200	254	1485	1390	1325	2800	32-48