Benefits of a Horizontal Split Case Fire Pump
If you're looking for a fire pump that can easily pump out fires in a flat area, you might want to consider a horizontal split case fire-pump. This kind of pump is inexpensive and can be purchased in China. Several benefits can make this type of pump great for your needs. diesel engine irrigation pump Some of these benefits include Double-suction impeller, Guide pins, Compact design, and Energy-saving features.
Guide pins
It is critical to install guide pins on your horizontal split case fire pump to prevent side-to-side movement when performing maintenance. You can easily create them at a machine shop in your locality. Choose the right length and sequence them so they engage correctly. Guide pins can be made of all-thread to fit the exact length of your pump. Then, use a nutdriver to tighten the guide pins into place.
Using a nutdriver to tighten guide pins on your horizontal split case fire pump is essential to ensure proper operation. The screws that hold the casing together should be of the correct length and thickness to ensure a secure fit. Also, guide pins on vertical split case pumps will help the pump maintain its level of efficiency. You should check the horsepower of the pumps before purchasing one. They can affect the price of electrical connections and controls.
Double-suction impeller
A double-suction impeller is an essential component of a horizontal split case fire pump. The design of the impeller is critical. It has to have a small critical speed, ranging from eight to ten feet per second. The rotor's critical speed should not drop below this limit, otherwise the pump will fail prematurely. In addition to the critical speed, the impeller ring clearances should be within 0.003 inches of the casing ring. The difference between the OD of the two wear rings may cause shuttling.
The casing must be properly prepared. The impeller ring should be properly positioned on the shaft. The shaft nut and the casing must be aligned with each other. The shaft must be balanced to the correct speed, and the impeller should be adjusted to its operating speed. Generally, an ISO Grade 2.5 impeller will meet the requirements. However, in some instances, the pump may have a tapered upper half.
Compact design
A horizontal split-case fire pump has extra bearings and impellers, and is larger than a traditional centrifugal pump. While it may cost more initially, this type of pump will last longer and require less maintenance. The horizontal split-case design also eliminates conces about orientation in a mechanical room. If you have a large fire-fighting system, a horizontal split-case fire pump can provide water to hydrants, sprinklers, and chemical mitigation systems.
There are many types of horizontal split-case fire pumps, and a few features you should know about each. They have a compact design, a double-entry impeller, and minimal axial thrust. They are also available in multiple sizes. Some of the features of a horizontal split-case pump include a stainless steel shaft, and a grease-lubricated antifricted bearing. A horizontal split-case fire pump has a UL or FM label for added safety.
Energy-saving
An energy-saving horizontal split case fire pump reduces maintenance costs. In addition, the pump's motor is located parallel to its impeller, which is easier to access during maintenance. It also takes up less space in the pump room. These pumps are also more efficient than traditional horizontal split-case pumps, which require extensive installation. Choosing one of these pumps is a wise choice for tight pump rooms. This model is also less expensive to purchase, and requires less floor space.
NFPA 20 compliance
For a fire pump to comply with NFPA 20, it must have a listed indicating butterfly or gate valve, drain valve, or ball drip to control the discharge of water. Before the revision, this provision did not apply, but now it does. Without a valve, water would be under pressure at the test header and discharged from the fire protection system. In addition, the manual must include information on how to use recommended spare parts and lubricants.
NFPA 20 is updated frequently to reflect changes in construction practices, new products, and technology. Therefore, engineers must stay informed of changes to ensure the safety of life in commercial buildings. This article assumes that readers have an understanding of fire pumps and can identify the changes in the code. NFPA 20 is applicable to many projects. In general, the manual's requirements are important to many water-based fire protection systems. Properly designed and installed fire pumps can meet these objectives.
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