产品概述
此气动暗板刀型闸阀是闸阀中的新品种，体积小，重量轻，轻型节材，是污水、煤浆、糖浆、泥浆、空气、渣水混合物、供水、造纸、矿山等行业中的理想产品。
暗板刀型闸阀采用金属对金属的硬密封，或采用金属对橡胶的软密封。在开启和关闭的过程中，闸板与密封面采用了特殊的设计，摩擦较少，经久耐用。
此种刀形闸的上密封突破了常规的密封形式，采用上盖结构，使得上密封由大面积的矩形密封改成了小面积的圆周密封，密封性能大大提高。在圆周密封的基础上，又采用了目前国际上*的浮动密封结构，使得上密封达到了与管道同寿命的程度，从而整体上提高了阀门的使用寿命。
此种闸阀在手轮顶部加装封套装置后，可以使阀门活动部件全部处于封闭状态，闸板和阀杆的丝杆传动不会因润滑油干枯而卡涩。特别适合在粉尘及干燥的恶劣环境中长期正常工作。
注：可根据使用单位的环境和要求来设计与生产，适合用户的安装和使用。
DMZ673H型气动暗杆刀型闸阀过配用电磁阀、接近开关等附件可以完成开、关两位置的动作控制和信号输出，也可以完成连续动作的自动控制，闸板加装封套装置后，可以使阀门活动部件全部处于封闭状态，闸板和阀杆的丝杆传动不会因润滑油干枯而卡涩，防止介质外泄等优点，适宜在含粉尘或焦油的煤气管线中使用特别适合在粉尘及干燥的恶劣环境中长期正常工作。
技术参数范围
公称压力：0.6MPa、1.0MPa、1.6MPa、2.5MPa、150LB
公称通径：DN50mm~DN2000mm NPS 2"~80"
适用温度：-38℃~1100℃（具体温度范围视密封副材质和介质性质而定）
连接法兰：ANSI B16.5、GB/T9113、JB/T79、HG、SH、JIS、DIN、NF、BS
主体材料：C.I、WCB、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、CF8、CF8M、CF3、CF3M、2Cr25Ni20
密封形式：硬密封、软密封
泄 漏 量：硬密封：D级（液体0.1×DNmm3/s）；软密封：（零泄漏）
配套附件：安装法兰
气电控制功能说明
1、采用双电控三位五通电磁阀控制气动刀型闸阀气缸，采用三位开关，可控制闸阀在上限位、下限位及任意位置停留。
2、在上限位、下限位置停留时，上限位及下限位置的限位开关，发出一组常开或常闭的独立信号触点。可作为状态指示用。
3、浆液阀在上限位下限位置停留时，上限位及下限位置的限位开关，自动切断电磁阀相应控制线圈的电源。这样闸阀在上限位及下限位置长期停留时，电磁阀的电控线圈不通电，可避免电磁线圈发热提高电磁阀使用寿命，大大地提高了可靠性。
4、浆液阀在上限位及下限位置长期停留时；气源被切断不耗气，但锁定阀门气缸的气压仍保持在气缸中，能保证可靠停位。
5、在气缸开关过程中，切断控制电源，则气缸进出气也同时被切断，锁定阀门气缸的气压仍保持在气缸中，如气缸活塞、电磁阀及接头无泄漏，则闸阀可在任意位置长期停留。
可选附件
1、单或双控电磁阀（有24V、220V等电压供选择，必要时可选防爆电磁阀）
2、接近开关
3、气源处理三联件（包括减压阀、过滤器、油雾器）
4、电/气阀门定位器（调节型用）
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.
DMZ673H Pneumatic non-rising stem type knife gate valve with solenoid valve, close to switch, etc, can complete the action of two position control and signal output, also can complete automatic control of continuous motion, after installation of sleeve device gate, all moving parts in a closed state, can make the valve disc and stem lead screw drive will not unsmooth by lubricating oil dry, to prevent leakage of medium, suitable for use in gas pipeline containing dust or tar is especially suitable for long-term work in dust and dry environment.
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
Gas-electric control function
1、Adopts double electric control three five-way solenoid valve control type pneumatic knife gate valve cylinder, adopt three switch, can control valve in the ceiling, floor and any place to stay.
2、Stay in the ceiling, floor, the upper limit and lower limit position limit switch, send out a set of normally open or normally closed contact of independent signals. Can be used as a status indication.
3、Slurry valves at a UCLA's position, the upper limit and lower limit position limit switch, automatic cut off the power of the corresponding control solenoid valve coil. This gate valve a long stay in the upper limit and lower limit, the electromagnetic valve of the electric coil not electricity, can avoid electromagnetic coil heat to improve the service life of the solenoid valve, reliability has been greatly increased.
4、Slurry valves when the upper limit and lower limit position long stay; Air supply is cut off gas consumption, but locking valve cylinder pressure remained in the cylinder, can guarantee the reliable parking.
5、In the process of the cylinder switch, cut off the control power, the cylinder in and out of gas at the same time also is cut off, lock the valve cylinder pressure remained in the cylinder, piston cylinder, solenoid valve and joint without leakage, the gate valve can be a long stay in any position.
Optional accessories
1、Single-control or double-control solenoid valve (24V, 220V, etc. optional voltage; explosion-proof solenoid valve is optional when necessary)
2、Proximity switch
3、Air supply processing triple-connection unit (including air reducing valve, filter, and atomized lubricator)
4、Electric/pneumatic valve positioner (for regulating type use)

主要外形及连接尺寸Profile and connection dimension											单位Unit:mm
PN	DN	L	D	D1	D2	H	N-M	PN	DN	L	D	D1	D2	H	N-M
0.6	150	57	280	240	210	680	8-20	1.0	150	57	285	240	210	680	8-20
	200	70	335	295	265	820	8-20		200	70	340	295	265	820	12-20
	250	70	390	350	320	930	12-20		250	70	405	355	310	930	12-22
	300	76	440	400	368	1075	12-20		300	76	460	410	375	1075	12-22
	350	76	500	460	428	1249	16-20		350	76	520	470	435	1249	16-22
	400	89	565	515	482	1480	16-22		400	89	580	525	485	1480	16-27
	450	89	615	565	532	1560	20-22		450	89	640	585	545	1560	20-27
	500	114	670	620	585	1680	20-22		500	114	715	650	609	1680	20-30
	600	114	780	725	685	2150	20-27		600	114	840	770	720	2150	20-36
	700	130	895	840	800	2800	24-27		700	130	910	840	788	2800	24-36
	800	130	1010	950	898	3200	24-30		800	130	1025	950	895	3200	24-36
	900	140	1110	1050	1005	3600	28-30		900	140	1125	1050	998	3600	28-36
	1000	216	1220	1160	1115	4000	28-30		1000	216	1255	1170	1110	4000	28-42
	1200	254	1450	1380	1325	4500	32-36		1200	254	1485	1390	1325	4500	32-48