Low cost actuated butterfly valves - a reliable product for industry 

Cheap actuated butterfly valves are not a compromise, but an engineering choice. We saw how at a plant in Kazan, the pneumatic actuators of old valves failed for three months in a row due to overheating at 45°C and frequent cycling. After replacing withMotorized butterfly valves- without reconfiguring the pipeline, without changing the flange connection - they simply cut out the old body and welded in a new one - there was not a single downtime. This is not marketing. It is the result of 12 years of experience working with systems for conveying powders, slurries and gases in the chemical, mining and energy industries.

Why “cheap” does not mean “unreliable” - technical reality

The word “cheap” in the context of industrial valves often raises alarm bells. But the price here is a consequence of optimization, not simplification. We tested 17 models of actuated butterfly valves under conditions of constant vibration (up to 8Hz), at temperatures from –20 to +120°C and pressures up to 1.6MPa. The best performance was achieved by a design with a cast body made of cast iron SCh20 and a disk made of stainless steel 12Х18Н10Т - without welds along the seal contour. This type of valve can withstand 10,000 cycles without losing its seal. Electric drives of the YZD-24/48 series operate from 24V DC, consume no more than 35W in hold mode and have a full rotation time of 8–12 seconds. This is not a “budget copy” - it is a certified solution that complies with GOST R 54808-2011 and EN 1514-2.

Key point: low cost is achieved through standardization of standard sizes (DN50–DN600), unification of drives and rejection of redundant automation. There are no “smart” Modbus RTU protocols in the basic version - there is a reliable discrete input/output, mechanical limit switch and jam protection. If your task is to open/close a dust pipeline every 4 hours, and not to synchronize 37 valves into a single SCADA system, unnecessary functions only reduce MTBF.

Where are the most common mistakes made when choosing - and how to avoid it

Some people think: “If the shutter is 15% cheaper, it can be installed everywhere.” But we recorded four typical failures:

• Installation in environments with abrasive particles without reinforced sealing— a conventional EPDM rubber seal wears out within 3 months when transporting iron ore;
• Ignoring the moment of inertia when calculating the drive— a DN300 valve with an aluminum disk requires half the torque than a similar one with a steel disk;
• Connection to a 220V network without taking into account starting currents— the YZD-220 drive can “knock out” the machine on the switchboard if it is designed for 6A, and the starting current is 9.2A;
• Installation without compensation for axial displacement of the pipeline— even 1.5 mm misalignment leads to accelerated wear of the shaft and bearings.

The solution is simple: before ordering, send us the environmental parameters (temperature, pressure, composition, cycle frequency), a photo of the flange connection and a connection diagram. We give recommendations on disc material, seal type and drive power - free of charge, within 24 hours.

How the product works in practice - not theory, but numbers

At one of the plants in the Ural region, we replaced 22 valves in the limestone flour supply system. Butterfly valves with a DN200 drive were installed, the body was SCh25 cast iron, the disc was steel 08Х18Н10, the seal was Viton fluorine rubber, the drive was YZD-24. The average cost of one set is 28,700 rubles. The payback period was 5.2 months due to a reduction in downtime by 93% and a reduction in maintenance costs (replacement of drives was reduced from 4 times a year to 1 time in 2 years). The presence of a manual override turned out to be critically important: when the power is turned off, the operator opens the shutter with a key in 6 turns - without dismantling, without special tools.

All valves undergo factory tests: hydraulic pressure of 2.5 MPa for 5 minutes, class “A” tightness according to GOST 9544-2015, torque check on each specimen. Certificates included. Not “on request”, but always.

Cheap motorized butterfly valves mean you pay for the function, not the brand.

Chengdu Yizhi Technology Co., Ltd. is a design institute established in 2013 on the basis of Chengdu Huaxi Chemical Technology Co., Ltd. The registered capital is 120 million yuan. We do not produce “logo” closures. We design them for a specific task: for dust, for aggressive gases, for high temperatures. Cheap - because we do not have retail chains, no advertising budgets of $5 million, no premium markups for an “international name.” There are engineers who go to sites, measure the temperature in mines, listen to the noise of fans and then finalize the drawing.

Cheap butterfly valves with a drive mean you get documentation in Russian, a 24-month warranty, technical support via WhatsApp and the opportunity to order a trial batch of three pieces. This is when “cheap” does not mean “wait 90 days”, but means delivery from Russia in 7 working days. Detailed technical specifications, connection diagrams and compatibility tables are on the websiteyzkjhx.ru. There is also a cost calculator for your DN and operating conditions. The choice is yours. And reliability is already built into the case.