The actuator on my automated valve operates, but the valve won’t turn. Why?

Most likely the valve stem or actuator coupling is broken.

Why doesn’t my valve open or close completely when the actuator operates it?

The electric actuator limit switches or the pneumatic actuator position stops are not correctly adjusted.

When I energize the solenoid on my pneumatic actuated valve, the valve won’t turn. How come?

Probably because there is no air pressure to the solenoid or dirt has jammed it. Also, debris might be trapped inside the valve. Or, the air pressure is not sufficient to operate the actuator. Remember: measure air pressure at the actuator, not at the compressor.

Can I buy an actuator from one manufacturer and mount it to a valve from another manufacturer?

Maybe. First, be sure that the actuator torque output is sufficient to turn the valve reliably. Second, you will have to fabricate a custom mounting bracket and coupling to connect the actuator to the valve.

What happens if I lose power to my electric actuator in the middle of an actuation cycle?

The valve will stop somewhere between full open and close. When power is reapplied to the original circuit, the actuator will complete the cycle.

I ordered a fail open pneumatic actuated valve by mistake. I needed a fail closed one. What can I do?

To make the change just remove the actuator from the valve and turn it, or the valve stem, 90 degrees and remount the actuator.

I’ve installed my automated valve in the line, but now I don’t know if the valve is in the open or closed position. How can I find out?

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

Do I have to have the solenoid valve that controls the air supply to my pneumatic actuator mounted right on the actuator?

Remove the actuator from the valve and check the valve stem. Most ball valves have stem flats at right angles to the flow when the valve is in the off position. On butterfly valves check the stem flow arrow marking.

How do I wire up my electric actuator?

Check the electric wiring schematic that came with the actuator for the correct hookup. Sometimes a copy is inside the actuator cover. If it is missing, don’t guess about the connections. Call the manufacturer for a schematic.

I’ve just installed an electric actuated valve and when I power it, it turns the valve 360 degrees and won’t shut off. What’s wrong?

The actuator is wired incorrectly (check the schematic accompanying the actuator), or the external control switch is not the correct type for the actuator.

My electric actuators cycle time is way too fast, can I slow it down?

Not unless you bought it with an optional speed control.

I just replaced a solenoid valve with an electric actuated valve and it won’t work. Why?

Actuators and solenoid valves require different types of electrical control switches. SPDT for actuators, SPST for solenoids. Check the actuator wiring schematic for the correct wiring and switch type.

COVNA HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve

COVNA HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve

HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve

according to the pneumatic actuator can be divided into two types. One is double acting type, the other is spring return type(single acting type). Features of pneumatic actuator ball valve including strong sealing performance and million lifetimes. 3-piece ball valve design which easy to disassemble, easy to clean, improve the reuse rate and extend the working lifespan.
As a pneumatic actuator ball valve manufacturer, we manufacture various sizes, materials, connections of pneumatic ball valves for your project for flow control.
Inquiry us to get the cost-effective valve solution!

模型

Actuator Type: Spring Return / Double Acting
Air Supply Pressure: 2.5 bar to 8 bar
Pressure: 10 / 16 / 25 / 40 / 64 bar (145 / 232 / 362 / 580 / 928 psi)
机身材料不锈钢 304/316/316L
介质温度：-10至180℃（14℉至356℉）
Suitable Media: Water, Liquids, Gas, Oil, Air, Steam, Corrosive Medium, etc

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Benefits of Pneumatic 3-Piece Ball Valves:

COVNA 3-piece ball valve provides a flexible solution, which can be customized into a variety of connection methods such as threaded connection, flange connection, clamp connection and welded connection. The three-piece ball valve is a full-bore valve with the advantage of large flow. In order to meet the customer’s requirements for valves, COVNA valves have undergone material testing and leakage testing to ensure the quality of the valve and avoid losses caused by the valve.

At the same time, the pneumatic actuator can help customers to remotely control the three-piece ball valve, improve production efficiency and reduce labor costs

Features Of HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve:

● Rack and pinion pneumatic actuator with high torque up to 4678Nm

● Available in spring return and double acting type actuator to meet your project’s requirements

● Also available in welding, tri-clamp, threaded and flange connection types for your choice

● Easy to install and easy to repair to extend the lifespan

● 1 Million lifespans. Offering a cost-effective valve solution for your project

Technical Parameters Of HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve:

尺寸范围	DN08 to DN100	Valve Material	不锈钢 304/316/316L
中型	Air, water, steam, oil, gas, etc	连接	Thread/Flange/Tri-clamp/Welding
Seal Options	NBR, EPDM, VITON, PTFE	工作压力	10 / 16 / 25 40 / 64 bar (145 / 232 / 362 / 580 / 928 psi)
Temperature Of Medium	-10 to 180℃(14℉ to 356℉)	致动器类型	Spring Return / Double Acting Pneumatic Valve Actuator
Core Material Options	不锈钢 304/316/316L	Applications	Water treatment, Packing industry, Food and beverage, etc

Dimension of HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve:

Technical Parameters Of COVNA Pneumatic Valve Actuators:

结构	Rack and pinion pneumatic valve actuator
Mounting	ISO5211, NAMUR, DIN3337
Air Supply Pressure	2.5 bar to 8 bar
Double Acting Type	Air to open, air to close, air supply failure to keep the current position. Torque range from 8Nm to 4678Nm
Single Acting (Spring Return)	Air to open, interrupt air to close, air failure to close. Torque range from 5Nm to 2792Nm
Optional Accessory	Positioner, Limit switch, Gearbox, F.R.L, and Pneumatic solenoid valve

COVNA AW Series Pneumatic Actuator:

AW series high torque pneumatic rotary actuator suitable for the large size ball valve which has higher torque needs. Such as trunnion mounted ball valve. To ensure the valve opens or closes smoothly.

● Double acting type: Torque range from 515Nm to 157,300Nm

● Spring-return type(single-acting type): Torque range from 270Nm to 37,000Nm

阀门执行机构的技术参数

双作用	空气打开、空气关闭、供气设备无法保持当前位置
单作用 N/C	空气打开、空气关闭中断、空气关闭失败
单作用 N/O	空气关闭，中断空气打开，空气无法打开
可选配件	反向电磁阀、限位开关盒、空气过滤减压阀、定位器、手柄手册、锁定阀。

阀体技术参数

身体		阀门组件
尺寸范围	DN50~DN400	密封材料	不锈钢
机身材料	不锈钢 tseel	核心材料	不锈钢
结束连接	晶片，法兰	阀杆材料	不锈钢
工作压力	1.0, 1.6MPa	适用媒体	水、油、气、液体、蒸汽、粉末、防腐基质
结构	中线结构/ A 型	适用媒体	水、油、气、液体、蒸汽、粉末、防腐基质

1.石油和天然气工业

管道流量和压力控制：用于天然气和石油管道的流量和压力控制，确保运输过程中的稳定性。
气体和液体分配系统：调节气体或液体的流量，确保在各种运行条件下的精确控制。
分配系统自动化：用于炼油厂和天然气加工厂，实现流体分配自动化并调节反应过程。

2.化工和石化行业

反应器压力和流量控制：用于化学反应器、储罐和其他设备，控制压力和流量，确保化学反应过程的稳定性。
流量/压力调节：在聚合、精炼和蒸馏等工艺中调节液体或气体的流量，以确保高效生产。
蒸汽控制：调节蒸汽发生器和分配系统中蒸汽的流量和压力。

3.水和废水处理

水流控制：调节供水和废水处理系统中的水流和水压，确保正常运行。
气体和化学品添加：调节水处理过程中添加的化学品或气体（如氯气或氨气）的流量。

4.暖通空调（HVAC）系统

温度控制和气流调节：用于空调系统，调节制冷或制热流体的流量，以保持所需的温度。
压力和气流调节：调节通风、空调和加湿系统中的气流和气压，确保室内舒适。

5.食品和饮料业

液体流量控制：精确控制酿造、乳制品生产和饮料装瓶等流程中的液体流量。
温度和压力调节：在加热、冷却和灭菌过程中调节温度和压力，确保产品质量和安全。

6.制药业

精密流量控制：调节制药工艺中液体和气体的流量，确保工艺参数的精确控制。
压力控制：调节清洗和消毒系统的压力，确保系统稳定运行。

7.HVAC 系统

气流和温度控制：控制气流和温度，调节环境条件，确保建筑物内的舒适度和能源效率。

8.钢铁和冶金工业

气体流量控制：在冶炼和加热过程中精确调节氧气和氮气等气体的流量，以确保稳定的炉温和化学反应。
冷却液流量调节：调节冷却系统中冷却液的流量，确保设备的温度控制。

9. 火电行业

蒸汽和水流量及压力控制：调节锅炉系统、热交换器和发电厂中的蒸汽和水流量，确保热力系统的高效运行。

10.采矿业

矿浆流量调节：在运输和分离过程中调节矿浆的流量和压力，确保矿物的高效提取和加工。

我的自动阀门上的执行器可以工作，但阀门无法转动。为什么会这样？

很可能是阀杆或执行器联轴器断裂。

为什么我的阀门在执行器操作时不能完全打开或关闭？

电动推杆限位开关或气动推杆位置挡块未正确调整。

当我给气动执行阀上的电磁铁通电时，阀门无法转动。为什么会这样？

可能是因为电磁阀没有气压或有污物堵塞。另外，阀内可能有杂物。或者，气压不足以操作执行机构。记住：测量执行机构的气压，而不是压缩机的气压。

我能否购买一家制造商的执行机构，并将其安装到另一家制造商的阀门上？

可能。首先，要确保执行机构的扭矩输出足以可靠地转动阀门。其次，您必须定制一个安装支架和联轴器，以便将执行机构与阀门连接起来。

如果我的电动执行机构在执行周期中途断电，会发生什么情况？

阀门将在全开和关闭之间的某个位置停止。当电源重新接入原始电路时，执行器将完成循环。

我错误地订购了一个故障打开的气动执行阀。我需要的是一个故障关闭阀。我该怎么办？

更换时，只需将执行机构从阀门上卸下，将其或阀杆旋转 90 度，然后重新安装执行机构即可。

我已经在管路中安装了自动阀门，但现在我不知道阀门是处于打开还是关闭位置。如何才能知道呢？

从阀门上卸下执行机构并检查阀杆。当阀门处于关闭位置时，大多数球阀的阀杆平面与流量成直角。在蝶阀上，检查阀杆流量箭头标记。

控制气动执行器气源的电磁阀是否必须安装在执行器上？

从阀门上卸下执行机构并检查阀杆。当阀门处于关闭位置时，大多数球阀的阀杆平面与流量成直角。在蝶阀上，检查阀杆流量箭头标记。

如何为电动推杆接线？

检查执行机构附带的电气接线示意图，了解正确的连接方式。有时在执行机构盖子内就有一份。如果没有，不要猜测连接方式。致电制造商索取示意图。

我刚刚安装了一个电动阀门，当我给它通电时，阀门会旋转 360 度，而且不会关闭。出了什么问题？

执行机构的接线不正确（检查执行机构附带的原理图），或者外部控制开关的类型与执行机构不匹配。

我的电动推杆周期太快，能不能慢下来？

除非你买的时候选装了速度控制器。

我刚把电磁阀换成了电动阀，但它无法工作。为什么会这样？

执行器和电磁阀需要不同类型的电气控制开关。执行机构使用 SPDT 开关，电磁阀使用 SPST 开关。请查看执行机构接线示意图，了解正确的接线和开关类型。

仍有困惑？请联系我们！

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COVNA HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve

HK56-3PS Stainless Steel Pneumatic Actuator Ball Valve

模型

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产品常见问题

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Benefits of Pneumatic 3-Piece Ball Valves:

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