News

Matters needing attention of boiler feed water pump

1. Pump can only run within the specified parameters; 2. Pump conveying medium must not contain air or gas, otherwise it will cause cavitation grinding and even damage parts; 3. Pump can not convey granular medium, otherwise it will reduce the efficiency of pump and the life of parts; 4.The pump ... Read More

Matters needing attention of Submersible sewage pump

1. Before use： 1).Check whether there is oil in the oil chamber. 2). Check whether the plug and sealing gasket on the oil chamber are complete. Check whether the plug has tightened the sealing gasket. 3).Check whether the impeller rotates flexibly. 4). Check whether the power supply device is sa... Read More

Introduction to common pump terms (6) – Pump cavitation theory

Cavitation of Pump: Theory and Calculation Overview of cavitation phenomenon The pressure of liquid vaporization is the vaporization pressure of liquid (saturated vapor pressure). The vaporization pressure of liquid is related to temperature. The higher the temperature, the greater the vaporiza... Read More

Introduction to common pump terms (5) – Pump impeller cutting law

Fourth section Variable-diameter operation of vane pump Variable-diameter operation means cutting off part of the original impeller of vane pump on lathe along the outer diameter. After the impeller is cut, the performance of the pump will change according to certain rules, thus changing the work... Read More

Introduction to common pump terms (4) – Pump similarity

law Application of similarity theory of pump 1. When the similar law is applied to the same vane pump running at different speeds, it can be obtained: •Q1/Q2=n1/n2 •H1/H2=(n1/n2)2 •P1/P2=(n1/n2)3 •NPSH1/NPSH2=(n1/n2)2 Example： Existing a pump, the model is SLW50-200B, we need change SLW50-... Read More

Introduction to common pump terms (3) – specific speed

Specific Speed 1. Specific speed definition The specific speed of water pump is abbreviated as specific speed, which is usually represented by the symbol ns. The specific speed and the rotational speed are two completely different concepts. The specific speed is a comprehensive data calculated ... Read More

Introduction to common pump terms (2) – efficiency + motor

power speed 1. Effective Power: Also known as output power. It refers to the energy obtained by the liquid flowing through the water pump in a unit time from the water pump . Pe=ρ G Q H/1000 (KW) ρ——Density of liquid delivered by pump（kg/m3） γ——Weight of liquid delivered by pump（N/m3）   ... Read More

Introduction to common pump terms (1) – flow rate + examples

1.Flow–Refers to the volume or weight of the liquid delivered by the water pump per unit time.Expressed by Q, the commonly used units of measurement are m3/h, m3/s or L/s, t/h. 2.Head–It refers to the increased energy of transporting water with unit gravity from the inlet to the outle... Read More

HGL/HGW series single-stage vertical and horizontal chemical pumps

HGL and HGW series single-stage vertical and single-stage horizontal chemical pumps are based on the original chemical pumps of our company. We fully consider the particularity of the structural requirements of chemical pumps during use, draw on advanced structural experience at home and abroad, ... Read More
<< < Previous 3456789 Next > >> Page 6 / 15