The flow regulating valve (also known as electric flow regulating valve or electric flow and pressure regulating valve) is a key valve in the water conveyance system for regulating flow and pipeline pressure. This device is electric, with an electric-with-manual version, and achieves remote control through sensor monitoring of water level, with an actual operational error generally ranging from 1-2%. The core structure includes a valve body, piston, sealing components, and electric actuator. It uses a ductile iron valve body and stainless steel piston, and achieves linear flow regulation by changing the flow area through a slider-crank mechanism. The piston-type pressure and flow regulating valve eliminates cavitation through an outlet collision energy dissipation design, maintaining a constant flow rate. Its nominal pressure reaches 10.0 MPa, and its applicable temperature range is -10°C to 135°C. Equipped with an intelligent control system supporting remote control via 4-20 mA signals, it has a protection level of IP68 and zero leakage in the fully closed state. The flow regulating valve (also known as electric flow regulating valve or electric flow and pressure regulating valve) produced by Zhejiang Shanliu is widely used in many large-scale water conveyance projects due to its high regulation accuracy, low cavitation, noise, and vibration, good energy dissipation effect, ideal flow-opening curve, and ease of automatic control.

The eccentric hemispherical valve is an advanced valve utilizing an eccentric structure. Its core lies in the intentional offset between the rotation center of the spherical crown (hemispherical valve core) and the sealing surface of the valve seat (divided into single, double, and triple eccentric), which achieves frictionless or instantaneous disengagement during the opening and closing process, greatly extending the valve's lifespan. The core advantages of this valve are significant: low torque, easy operation; reliable sealing, especially the triple eccentric structure, which can achieve metal hard sealing under high temperature and high pressure; extremely low flow resistance; and excellent self-cleaning and shearing capabilities, capable of cutting off media containing fibers or particles. The manual, turbine, electric, pneumatic, stainless steel, top-mounted, and side-mounted eccentric hemispherical valves produced by Zhejiang Shanliu Valve Technology are widely used in slurry and sewage pipelines in industries such as wastewater treatment, paper making, metallurgy, and coal, as well as in high temperature and high pressure steam and oil and gas systems in the power and petrochemical fields. They are efficient solutions for handling harsh media and severe working conditions.

Hydraulic control valve is a multi-purpose valve with diverse valve functions depending on the different configurations of accessories. It is composed of a main valve and its external needle valve, pilot valve, solenoid valve, float valve, and pipeline combination. Hydraulic control valve is a general term for a series of multi-purpose control and safety valves. Mainly including: remote control float valve, liquid level control valve, holding pressure reducing valve, slow closing check valve, flow control valve, differential pressure control valve, pressure relief holding valve, electric remote control valve, multifunctional water pump control valve, emergency shut-off valve, diaphragm hydraulic control valve, piston hydraulic control valve, etc. The main characteristics of the hydraulic control valve produced by Zhejiang Shanliu Valve Technology are: it utilizes the pressure of the medium itself and the operation of the hydraulic system in its mode of action, and can be automatically controlled, with accurate action and reliable performance. It can be widely used in daily life, production, fire protection, water supply and drainage system pipelines to play a control and safety role.

The primary function of a balancing valve is to achieve balance in flow before and after the valve by regulating the relative balance of pressure on both sides of the pipeline before and after the valve, or by means of flow diversion, in order to alleviate pressure differences within the pipeline and ensure that the pressure inside the pipeline remains in a relatively balanced state, thereby preventing pipeline damage. Its working principle involves changing the clearance (i.e., opening) between the valve core and the valve seat, thereby altering the flow resistance of fluid passing through the valve to achieve the purpose of regulating flow. Balancing valves play a role in dynamic and static balance regulation under hydraulic conditions, depending on the design and application scenario of the valve. Static balance valves consume excess pressure differences by manually adjusting the valve opening to eliminate hydraulic imbalances between circuits. Dynamic balance valves automatically adjust the resistance coefficient according to changes in system conditions to maintain constant flow. The digital locking balancing valve, dynamic balancing valve, static balancing valve, manual balancing valve, electric balancing valve, self-operated balancing valve, self-operated pressure difference balancing valve, self-operated flow balancing valve, and dynamic flow balancing valve produced by Zhejiang Shanliu are widely used in various air conditioning and heating pipelines, effectively balancing pipeline pressure and playing a role in energy conservation and emission reduction for central air conditioning.

The sludge valve is a valve device used to discharge sludge and wastewater from the bottom of pools, and is widely applied at the bottom of water treatment tanks such as filtration tanks, sedimentation tanks, and mixing tanks in urban water plants and wastewater treatment plants. The working principle of the sludge valve is to help remove sediment from the bottom of pipelines or pools by periodically opening and closing, thus maintaining smooth operation of the system. The structure of the sludge valve mainly includes a valve body, a hydraulic cylinder (or manual device), an air cylinder, a piston, a diaphragm, a valve rod, and a valve flap. Sludge valves can be divided into manual quick-opening sludge valves, angle-type sludge valves, pneumatic sludge valves, hydraulic sludge valves, electric sludge valves, diaphragm-type sludge valves, piston-type sludge valves, bottom sludge valves, and pneumatic quick-opening sludge valves. The diaphragm-type sludge valve is usually composed of a valve body, upper and lower diaphragm chambers, a diaphragm, and a valve rod, while the piston-type sludge valve is composed of a hydraulic cylinder and a valve body. The sludge valves produced by Zhejiang Shanliu Valve Technology are characterized by rapid opening and closing, good sealing performance, and convenient maintenance.

A filter is an indispensable filtering device on the pipeline for conveying media, typically installed at the inlet end of pressure reducing valves, pressure relief valves, fixed level valves, or other equipment. A filter consists of a valve body or cylinder, filter screen, drain port or drain valve, transmission device, and electrical control part. After the water to be treated passes through the filter cylinder of the filter screen, its impurities are blocked. When cleaning is required, simply remove the detachable filter cylinder, clean it, and reinstall it. Therefore, its use and maintenance are extremely convenient. A filter is a small device that removes a small amount of solid particles from liquids, protecting the normal operation of equipment. Zhejiang Shanliu produces a wide range of filters, including Y-type filters, T-type filters, basket filters, stainless steel filters, hand-brushed filters, Y-type American standard filters, T-type American standard filters, fully automatic backwash filters, gas filters, and water filters.