Installation Archives

Common errors of butterfly valves:
The rubber elastomer in the butterfly valve will tear, wear, aging, perforate or even fall off during continuous use. The traditional thermal vulcanization process is

Double flange butterfly valve (16)

difficult to meet the needs of on-site repair. Special equipment is used for repair, which consumes a lot of heat and electricity, which takes time and effort. Today, we use new method gradually of adopting polymer composite materials to replace traditional methods. The superior adhesion and excellent wear and tear resistance of its products ensure that the repair cycle reaches or even exceeds the life cycle of new parts, greatly reducing downtime.

Installation and maintenance of butterfly valves:
1. During installation, the valve disc should stop at the closed position.
2. The opening position should be determined according to the rotation angle of the butterfly valve disc.
3. Butterfly valves with bypass valves should be opened before opening.
4. The installation should be carried out according to the manufacturer’s installation instructions. The heavy butterfly valve should be installed with a solid foundation.

Construction and installation points
1. The installation position, height, and direction of entrance and exit must meet the design requirements, and the connection should be firm and tight. The handles of all kinds of manual valves installed on thermal insulation pipes must not be downward.
2. The valve must be visually inspected before installation, and the nameplate of the valve should comply with the customer’s national standards. For valves with a working pressure greater than 1.0 MPa and acting as a shut-off on the main pipe, strength and tightness performance tests should be carried out before installation, and qualified before use. During the strength test, the test pressure is 1.5 times the nominal pressure, the duration is not less than 5min, and the valve housing and packing should be leak-free. During the tightness test, the test pressure is 1.1 times the nominal pressure; the test pressure lasts no less than 120 seconds during the test, and the valve flap sealing surface is qualified as no leakage.

Tianjin Tanghaidongyang valve Co., Ltd. is one of the largest butterfly valve manufacturers in China, main products are butterfly valves, check valves. Products range: butterfly valve, lug type butterfly valve, wafer type butterfly valve, U-type butterfly valve, double flange butterfly valve, gate valves, check valves, globe valves, valve parts (Valve body, Valve disc, Valve shaft, Valve seat…)

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

1. Before installing the manual butterfly valve, do not throw it away at random. It needs to be placed in a cool, dry and ventilated environment, and it must be covered well to prevent the valve from being contaminated with dust and other debris, which affects the later use.

2. Before installing on the pipeline, the pipeline must be calibrated first. The positions of the pipelines at both ends must be

wafer-type-butterfly-valve-with-handle-13

consistent, and there must be no deviation. Otherwise, if the manual butterfly valve is installed when the pipeline deviates, it will cause tension on the valve body. Or the impact of rupture.

3. In addition to the calibration of the pipeline, there is another preparation before installation, that is, to clean the manual butterfly valve and its pipeline to ensure the cleanness of the valve and the pipeline, otherwise it will affect the sealing effect of the valve.

4. Manual butterfly valves require frequent manual operations. Therefore, the installation position of the manual butterfly valve is also very particular. The valve installation position must be convenient for personnel operation and future maintenance. It has been demonstrated that the best position for manual valve installation is about 1.2 meters on the operating floor. For valves installed outdoors, cover the valve with some covering to prevent the bad weather from affecting the valve.

5. During installation, the butterfly plate of the manual butterfly valve must be in the closed position to avoid collision damage of the butterfly plate and the pipeline flange, affecting the sealing performance.

6. After the installation is completed, commissioning should be carried out. If the manual butterfly valve has an opening and closing failure during use, it is necessary to find out the cause and eliminate the failure. It cannot be forced to open and close by tapping, prying, or brute force.

The installation requirements for manual butterfly valves are actually very simple. We need to pay attention to the details after the valve is purchased. Of course, the key to the safety of the pipeline and the service life of the valve lies in the correct selection and configuration.

Commonly used butterfly valves are wafer-type butterfly valves and flanged butterfly valves. Wafer type butterfly valve is to connect the valve between the two pipeline flanges with double-headed bolts. Flange type butterfly valve is to have a flange on the valve, and use bolts to connect the two ends of the valve to the pipeline flange. There are four types of butterfly valves in Tanghai Valve company, see below:

Butterfly Valve

Tianjin TanghaiDongyang Valve Co., Ltd. is one of the largest butterfly valve manufacturers in China. It was founded in 2006. Its predecessor was Tanghai Valve Manufacturing Factory. Now we have our own independent R & D, manufacturing, assembly and warehousing workshops; we have professional pre-sale and after-sale technical support and perfect services.

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Common failures of butterfly valves and the characteristics of installation

Installation requirements for manual butterfly valves

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