Vanky

INTRODUCTION HANDLING AND STORAGE Standard safety procedures should be followed to prevent personal injury or equipment damage. Additionally, the following instructions shall be followed during handling and storage to prevent any damage to the product: INSTALLATION This section describes the different installation methods: 2.1. Penstock (slide gates) installation Required Materials: Installation procedure: Step 2.1.1: Opening …

PENSTOCK INSTALLATION OPERATION AND MAINTENANCE MANUAL(WELDING) Read More »

Penstock A device for controlling the flow or level of liquid, consisting of a door that slides up and down, controlled by a mechanically operated spindle, which can be handwheel operation, electric actuator operation, pneumatic actuator operation and hydraulic actuator operation.   Penstock aperture The size of the opening in the Penstock frame for the …

Penstock definitions general Read More »

Abstract： Carrying out analysis& comparison of face—to—face and end—to—end dimensions of valves for main several standards at various countries on the basis of ISO， EN standards， and introducing the suitability of these standard series on the same aspect．

Key words： valve； d imensions； standard

Abstract: Proposes some standpoints and concerns about the selection of valve type, abstract the arti2cle focuses on such issues as resistance, strength, rigidity, and structure involved in the designing of butterfly valves.

Keywords: butterfly valve; design; select and use; discussion

With the development of society and the vigorous development of clean energy, hydropower projects have become more and more key development projects in the energy field.

Hydropower has a long history. Hydropower uses the drop of water to drive the turbine to rotate to realize energy conversion. In order to ensure the normal operation and maintenance of the turbine, a cut-off valve must be set at the inlet of the turbine to control the operation and cut-off of the water flow. This is the turbine inlet main valve. The inlet valve group includes upstream and downstream pipes, expansion joints, bypass valve groups, exhaust valves, etc. For more information, please click this link. Regarding the selection of the main valve of the turbine inlet valve group, we briefly explain our company’s suggestions around this issue.

Abstract: It states briefly the corrosion principles and features of cast iron, the corrosion speed for cast iron and cast steel valve in the seawater, it also goes to states the corrosion resistance capacity after adding the alloy and the running condition for nickel-chrome cast iron working condition.
Keywords: valve; cast iron; seawater; corrosion

Purpose, characteristics, and main performance parameters   Butterfly check valve is suitable for pipelines with a working temperature of ≤ 80℃ and medium are water, which can prevent the pressure rise (water hammer) caused by the reverse flow of the medium and the closing of the reverse flow. Performance Spec Sheet   Principle and structure …

Micro-resistance slow-closing butterfly check valve structure and maintenance Read More »

The metal sealing butterfly valve uses a double eccentric structure and a special oblique cone elliptical sealing structure, which solves the defect that the sealing surface of the traditional eccentric butterfly valve is still in sliding contact friction at the moment of opening and closing 0°~10°, and realizes the butterfly plate at the moment of …

Metal sealing butterfly valve structure type Read More »

Summary The results of macro and micromorphology and metallographic structure analysis of SS304 gate valve used for leakage of ammonium phosphate solution using metallographic microscope and scanning electron microscope are introduced, and the use of photoelectric direct reading spectrometer, X-ray fluorescence spectrometer and The NHO analyzer analyzes the gate valve material and the composition of the surface deposits. It summarizes the failure modes of the SS304 gate valve used in the ammonium phosphate solution pipeline as corrosion and fouling and points out why the SS316 valve is used in the ammonium phosphate solution pipeline. And put forward the corresponding countermeasures to solve the problem and the technical basis to prevent similar accidents.

Keywords 　Gate valve, leakage, failure analysis, fouling, corrosion