NEWS-第6页-HENAN MF VALVE CO.LTD.

Pinch Valve Exported to Russia

Recently, a customer in Russia purchased a batch of pinch valves from MF Valve. Here are the details of pinch valve purchased by the customer: ♦ Size: DN50-300 ♦ Body: Aluminium Alloy ♦ Sleeve: Natural rubber ♦ Pressure Rating: PN10 ♦ Handwheel operated ♦ Quantity: 830 sets Pinch Valve image The introduction of pinch valve Pinch valve is a fluid control device that relies on the principle of flow path constriction to reduce or shut off the passage of material. Most pinch valve designs feature a highly elastic sleeve or insert in the valve body which is gradually constricted or squeezed closed by either air pressure or by mechanical intervention. This method of valve closure is not only effective for controlling clean fluids but also works well for slurries with high concentrations of suspended solids. This is due to the fact that the flexible sleeve is capable of forming an effective seal around trapped particulates which would otherwise jam or block the mechanism of other valve types. Pinch valves are also particularly well suited to flow control applications because of their large operational ranges. Working principle When the hand wheel is turned clockwise, the large and...

04/032023

Packaging, transport and other considerations-valve

1. Products factory, should be stipulated in the factory standard packing, should check before packing product specification, inspection certificates and related accessories; 2. Certificate shall indicate the manufacturer, delivery time, the examiner, seals, etc.; 3. The product at the time of loading and unloading transportation, shall comply with the relevant regulations, so as not to damage; 4. When the user acceptance, should according to product standards; 5. After users find products are abnormal phenomenon, should inform us, the quality of product any objection, both sides should be recheck, as stipulated in the product standard and determined according to the final results; 6. Products from the date of delivery, ensure that use 18 months. An outdated products need to be used again, check the qualified rear can use, lest produce an accident.

02/222023

The possibility of failure and eliminating methods-butterfly valve

The possibility of failure Why Elimination method Seal leakage 1. The butterfly plate, seal with sundry 2. Butterfly plate, seal off match is not straight 3. Exports are equipped with uneven flange bolt stress or pressure 4. Pressure direction according to the requirements of figure2 1. Eliminate impurities, clean the valve cavity 2. Is worm gear or electric actuator adjusting screw of the actuator, the valve closed position in order to achieve correct 3. Check with telescopic flange plane and bolt clamping force, should be uniform pressure 4. According to the direction of arrow seal to pressure Two transverse leakage valve 1. On both sides of the sealing gasket failure 2. Uneven tube flange clamp force without pressure 3. Sealing ring, sealing ring gasket failure 1. Eliminate impurities, clean the valve cavity 2. Is worm gear or electric actuator adjusting screw of the actuator, the valve closed position in order to achieve correct 3. Check with telescopic flange plane and bolt clamping force, should be uniform pressure 4. According to the direction of arrow seal to pressure

12/212022

Butterfly Valve Installation and Maintenance

1、Valve before installation should do the following. ①. Carefully check whether usage of valve and its performance specifications; ②. To check whetherthere issundry,valvechannel and sealing surface and keep clear of in time; ③. Afteropeningthe valve toinstallintimedon’tloose any fastening screw on the valve at random; ④. Multilevel metal sealing and soft sealing butterfly valve with cast ironstandardflange, the rest with special flange butterfly valve (see figure 1) ⑤. Installation, debugging personnel should carefully read the instruction manual and pneumatic, electric and other specifications, in accordance with themanual,wiring diagramfor installation, operation, commissioning and wiring; ⑥. Usertesting. be sure to use the flange to clamp installed on both ends or pressure test (see figure 2); ⑦.Butterfly valve installed in the closed, valve channel should be used when welding plate blocks (see figure 4). Prevent the particles and sundry rub sealing surface. 2、Butterflv valve can be installed at anv Angle ofthe line. but can’tflip Usuallv in the form of vertical and horizontal installation. 3、Butterfly valve is aone-way commonly use, pay attention to the arrow onthe valve body for sealing off the medium pressure direction. (see figure 5) 4、Flange butterfy valve installed in the end of the linethe end of the side should be equipped...

10/222022

Common faults of Electric Butterfly Valve

If you do not carefully check the valve usage and property specifications before installing the electric butterfly valve, then there may be the following common faults: the valve cannot be reversed or the reversing action is slow, gas leakage, the electromagnetic pilot valve is faulty, etc. 1. The electric butterfly valve cannot be reversed or the reversing action is slow, which is generally caused by poor lubrication, spring is stuck or damaged, greasy dirt or impurities stuck in the sliding part and other reasons. In this regard, you should first check whether the oil mist device is working normally; Whether the viscosity of the lubricating oil is appropriate. If necessary, the lubricating oil should be replaced, the sliding part of the electric butterfly valve should be cleaned, or the spring and the wafer electric butterfly valve should be replaced. 2. After a long period of use, the electric butterfly valve is prone to the phenomenon of wear of the valve core seal ring, the stem and the seat damage, resulting in gas leakage in the valve, slow operation of the valve or inability to change direction normally. At this point, the seal ring, stem and seat should be replaced, or...

05/252022

The Introduction of Pneumatic Butterfly Valve

1.Pneumatic butterfly valve is composed of pneumatic actuator and butterfly valve. 2.Pneumatic butterfly valve classification: stainless steel pneumatic butterfly valve, hard seal pneumatic butterfly valve, soft seal pneumatic butterfly valve, carbon steel pneumatic butterfly valve. 3.The main advantages of pneumatic butterfly valve, simple structure, small size and light weight, low cost, pneumatic butterfly valve can be installed in the high-altitude dark channel for adjusting the flowing medium by Selenoid valve control operated. 4.The accessories of pneumatic butterfly valves mainly include: positioners, converters, relays, booster valves, position holding valves, pressure reducing valves, filters, lubricators, stroke switches, position transmitters, solenoid valves, handwheel mechanisms. 5.Butterfly valves are not only widely used in general industries such as petroleum, gas, chemical industry, and water treatment, but also used in the cooling water system of thermal power stations.

05/252022