Category: Volumetric (Piston) Type Water Meter

Apr 22 2015

Characteristics and classification of volumetric water meter

1, an overview of positive displacement meter

Positive displacement water meters are installed in closed conduits, some being full and the successive emissions Chamber of known volume of fluid and with fluid-drive mechanism of a meter. Because with pistons rotating to record the amount of drinking water through the pipe, also known as piston water meters, with initial flow of small, high precision, hygiene, easy reading and so on. Especially suitable for high quality, high cost of water for the occasion. As volumetric water meter repair debug more complex and high requirements for quality reasons, not yet widespread use in our country.

2, volumetric water meter characteristic

⑴ LCD display, convenient and intuitive readings, and instantaneous flow rate display cumulative flow.

⑵ test mode displays the cumulative flow of higher resolution, small-diameter minimum resolution: 0.00001m 3.

C with the zero function, each time you enter the test mode, the cumulative flow of test mode is cleared to zero, more applicable industrial ingredients measure the water.

⑷ rotating piston structure, with a small initial flow rate, high measuring accuracy, wear-resistant, non-rotational inertia and so on.

⑸ can be horizontal, vertical, inclined installation does not affect the accurate measurement of water meters.

⑹ with antimagnetic interference function, pleasing in appearance, small size, light weight and so on.
Volumetric (Piston) Type Water Meter

3, positive displacement meter classifications

Rotary piston volumetric water meter type and disc type, the two series, when the water flow through the meter, and water-driven piston (disc) rotation (Swing), and piston-cylinder (disk) the volume is constant, so the piston rotation measured by counting bodies (disc swing) number can be informed of water flow through the meter.

The main products for rotary piston volumetric water meter water meter, disc-type water meter did not use abroad for only the United States and a few other countries. Rotary piston meters for small caliber specifications, is characterized by high level of measurement (up to level c and level d) ability, high sensitivity, low flow rate measurement. Primarily used for metering of pipeline pure water in China, Ningbo Guoxin instrument technology limited, water meter products represented, meter size typically 8, 15, and 20mm.
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Jul 24 2014

Processing method of Rotary Volumetric Piston Water Meter installation techniques, characteristics, operation process, working principle and common problems

Volumetric meter is also called the piston type water meter, is a constant flow type water meter. The national standard in the volumetric meter is defined as “installed in the closed pipe, by some to be a water meter chamber volume successive full known and discharge fluid and with fluid driven mechanism.

Rotary Volumetric Piston Water Meter

Volumetric meter with rotary piston type and disc type two series, when the water flow through the meter, the drive piston flow (circleRotating disc) (swing), and a piston cylinder (disk chamber) volume is constant, so, by counting the measured piston rotation mechanism

Turn (disc swing) times, can get through the Rotary Volumetric Piston Water Meter of water.

Product volume type water meter is the main rotary piston type water meter, see figure C.5 and figure C.6 appendix C. At present is mainly used for the measurement of pipeline pure water, water purification water to produce drinking water meter water Limited by Share Ltd Ningbo and Ningbo Donghai instrument channel limited company as the representative, in the water meter diameter is 8, 15 and 20ram. Volumetric meter repair debugging complex, high requirement on quality, used in China has not yet been widely. Under the action of water pressure, water from the lower water inlet into the measurement chamber, center 3 driven rotary piston 7 surround the measurement chamber shaft to rotate, and the water from the piston blank and piston and the measuring chamber wall surface formed by the air flows to the upper outlet, at the same time the piston rotates, connected by a rotating shaft 4 and shifting fork 5 and counting mechanism, so as long as the note of piston rotation times, can flow through the water volume. Under the action of water pressure, water from the lower water inlet into the measurement chamber, center 3 driven rotary piston 7 surround the measurement chamber shaft to rotate, and the water from the piston blank and piston and the measuring chamber wall surface formed by the air flows to the upper outlet, at the same time the piston rotates, connected by a rotating shaft 4 and shifting fork 5 and counting mechanism, so as long as the note of piston rotation times, can flow through the water volume.

Volumetric meter with rotary piston type and Yuan Pan type two series, its principle is, when the water flow through the meter. The drive piston flow (Yuan Pan) rotation (swing), and the piston cylinder (Yuan Pan chambers) volume is constant, so, by counting mechanism measured piston rotation (Yuan Pan wobble) number it can obtain the flow through the water, water meter.

Requirements of installation and operation:

Requirements of installation and operation:

A, flow direction must be with the table on the arrow direction; B, the installation position to avoid pollution and flooding

This table for the Rotary Volumetric Piston Type Plastic Water Meter, the piston principle, through the rotation of the piston to measure the amount of water through the pipe.

Housing for the pressure casting of brass or stainless steel precision casting, internal main parts use of carbon composite materials, the counter is fully enclosed structure, flow into a eight bit digital recording.

Measurement grade this table for the C class, high sensitivity, small starting flow, clear reading, easy to install, without any range limit.

Measurement of the surface is most suitable for direct drinking water.

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Jun 23 2014

Drinking Water Measuring Instrument( Water Meter) performance characteristics, technical parameters, the working principle, product introduction and use

Multi parameter water quality detecting instrument design is excellent, very convenient to use. Can automatically compensate the error caused by temperature changes due to measurement. The instrument measured PH, mV, C, EC, CF, TDS value, can be read by the liquid crystal display apparatus, display and backlight function.

Drinking Water Measuring Instrument( Water Meter)

PH: pH

ORP: redox (unit: mV): the amount of bacteria, the disinfection effect “of =650mv measure

Electrical conductivity (ms/cm): salt, ion, impurity content. The very low

CF: concentration of reverse osmosis device.

Whether it contains water, mineral and trace element is the key to determine its acidity. The pH of water is contained by the ion water decision. The Drinking Water Measuring Instrument( Water Meter) of the acid strength, is indicative of ion activity. Natural water pH value between 7.0-8.0 in general, weakly alkaline; pure water pH value between 5.0-7.0 in general, acidic substances acidic amount of active in the body will make the body’s internal environment deterioration, the blood acidic, appear very unhealthy “acidic” exceed the standard easy hair fat, calories, health hazards. Acidic, alkaline food collocation is very important to human health, the normal human body fluids, including blood: intracellular, extracellular are weakly alkaline, pH of the blood is 7.35 ~ 7.45, when the pH value below 7.30 will make the body showed “acidic”, often with acidic food intake, will the body and the lactic acid increased due to the digestive organs of the excitement, will increase the body of calcium, magnesium plasma consumption, causing these nutritional deficiencies, and dental caries susceptibility. “Acidic” harm, often eating fatty food, make the body acidic substances accumulation, blood is acidic, the body’s internal environment began to deteriorate, appears very unhealthy “acidic”, dizziness, constipation, insomnia, anxiety, fatigue, decreased resistance, susceptible to upper respiratory tract infection. Because the blood viscosity increased, also can cause arteriosclerosis. In addition, only humoral pH is normal, the body cells and immune cells have the ability to engulf and destroy the cancer cells, cancer cells surrounding the pH value is 6.85 to 6.95, partial acid, survival and normal pH value is not conducive to cancer cells. Moreover, the body pH every drop of 0.1 units, insulin activity is decreased by 30%, which increases the risk of type 2 diabetes. Acidic foods too much influence intelligence British scientists found that: human brain fluid acid-base properties related to intelligence, that is in the range of body fluid pH within the allowed (i.e., pH value of 6.8 ~ 7.5, the acid is too high (low pH) low IQ; alkaline high IQ (PH high).

PH is a measure of the pH scale, in many ways to control the pH, these places need to know the pH value of the solution

PH is one of the most important Rotary Piston Volumetric Type Water Meter of water solution. Natural phenomena involving an aqueous solution where. Chemical changes and production processes are related to pH value, therefore, in industry, agriculture, medicine, environmental protection and scientific research field needs to measure pH value.

The acidic aqueous solution, Ph<7, pH value is small, said more acidic; alkaline aqueous solution, Ph>7, the bigger the pH value, alkalinity more strong.

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Jun 20 2014

Volumetric Piston Type Nylon Plastic Water Meter(Dry Register) structural features, working principle, operational procedures and FAQ

Nano nylon containing material product type (rotary piston) water table, the performance index of ISO4064; product can control temperature, low resistance to blast,

Volumetric  Piston Type Nylon Plastic Water Meter(Dry Register)

The meter adopts composite nano meter nylon material for manufacturing, the products are green, pollution-free, non-toxic and nano nylon, no corrosion problem, the performance is stable and reliable, fully meet the safety requirements of the water meter manufacturing. Water movement is a new transformation, can realize the dripping metering, clear reading convenience.

Analysis of various materials and application of water meter:

The industry is developed for domestic need Volumetric Piston Type Nylon Plastic Water Meter(Dry Register) and at the same time in the product standards.

Plastic water meter can not only solve the problems of cast iron water pollution two, copper water meter high price, but also prevent the installation of outdoor water meter copper piece is solution of theft.

The manufacturing process of plastic water meter, can fully reflect the energy saving and environmental protection, which is compatible with the national energy-saving emission reduction policies.

Nylon shell of water meter, in recent years is the preferred material for plastic water meter, water meter nylon plastic shell, in the international, the domestic market has withstood the test of various conditions.

Nylon material basically is divided into three levels, from high to low are: Swiss aromatic nylon (6T/6I), Germany BASF glass fiber nylon (PA66), glass fiber modification of domestic (PA6).

Nylon shell of water meter’s advantage lies in the health, security, cheap, its strength, anti-aging, anti creep as long as appropriate selecting, enough to meet the need of water meter.

However, because of the nylon raw material market price difference is very big, made of black water, very difficult to distinguish the performance, once a few years after the emergence of quality problems, may be explosive.

Nylon case possible problem is the problem of aging, ultraviolet irradiation therefore, critical water supplier test means and technical strength.

Nylon strength in water water will decrease the strength, toughness enhancement, only dry state 60%. The strength of nylon by means of adding glass fiber to fiber, nylon material more good prices more expensive, poor nylon material is glass fiber more of the cheaper.

Cast iron shell of water meter

Because the two pollution, has cast iron water so water meter shell, mandatory safety rules require casting materials in 2010 eliminated ash, for large caliber water, will replace the gray cast iron with spheroidal graphite cast iron and stainless steel material.

All contact parts in the Rotary Volumetric Piston Water Meter should be used generally non-toxic, no pollution, no biological activity material, and should be able to resist the internal and external corrosion.

Copper water meter

When phased out iron shell water is more and more high, the international price of copper is still in the low, some manufacturers use brass instead of cast iron water meter shell.

The subsequent rising copper prices, copper prices caused by water, and in the outdoor installation easy theft, made of brass instead of cast iron water meter shell trend has not formed climate.

China is a lack of copper resources in the country, and the copper smelting requires a lot of energy resources, and energy-saving emission reduction policies do not match.

Brass is a product of copper and lead, the Pseudomonas, its toxicity is far greater than the harm, iron rust on people so, use of brass, and can not solve the two problems of pollution.

Stainless steel 304 gauge

Stainless steel casting, forming distinct characteristics, product appearance.

The addition of trace elements of stainless steel material, can resist the external pollution, also won’t produce pollution to water quality in the interior.

The product strength meet the requirements of physical strength meter casing and accessories manufacturing.

Stainless steel water meter products can achieve food grade, no corrosion, no pollution second, durable.

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Jun 18 2014

Rotary Piston Volumetric Type Water Meter characteristics, water structure, technical parameters and the composition of the material

Volumetric meter is also called the piston type water meter, is a constant flow type water meter. The national standard in the volumetric meter is defined as “installed in the closed pipe, by some to be a water meter chamber volume successive full known and discharge fluid and with fluid driven mechanism.

Rotary Piston Volumetric Type Water Meter

Volumetric meter with rotary piston type and disc type two series, when the water flow through the meter, the drive piston flow (disc) rotation (swing), and the piston cylinder (disk chamber) volume is constant, so, by counting mechanism measured piston rotation (disc swing) times, can get through the water meter water.

Rotary Piston Volumetric Type Water Meter is the main rotary piston type water meter, water meter disc type not used in domestic, abroad also only a few countries American etc.. Rotary piston type water meter is generally small caliber specification, is characterized by measuring high level (up to C grade and D grade), small flow measurement capability, high sensitivity. At present is mainly used for the measurement of pipeline pure water, water purification water to produce drinking water meter water Limited by Share Ltd Ningbo and Ningbo Donghai instrument channel limited company as the representative, in the water meter diameter is 8, 15 and 20ram. Volumetric meter repair debugging complex, high requirement on quality, used in China has not yet been widely.

Under the action of water pressure, water from the lower water inlet into the measurement chamber, center 3 driven rotary piston 7 surround the measurement chamber shaft to rotate, and the water from the piston blank and piston and the measuring chamber wall surface formed by the air flows to the upper outlet, at the same time the piston rotates, connected by a rotating shaft 4 and shifting fork 5 and counting mechanism, so as long as the note of piston rotation times, can flow through the water volume.

Volumetric meter generally refers to the ordinary rotary piston type water meter, has the advantages of high accuracy and sensitivity. At present, it is not yet in China such as velocity meter (impeller, turbine and so on) that is generally used, but is widely used in Europe and the United States and other developed countries, as the share of 50% in France, 77% in Britain, 79% in Sweden, American is 99.8%; while in China and the former Soviet Union is almost zero.

Characteristic.

1, the measurement principle of  Volumetric Piston Type Nylon Plastic Water Meter(Dry Register).

2, high sensitivity, can be in 1 liters / low traffic hours were measured.

3, horizontal installation reach D standard, non horizontal installation of not less than C class standards.

4, the counter by vacuum sealing, can keep clear reading.

5, moving parts are made of high quality materials, stable and reliable performance, long service life.

6, the built-in check back plate, which can prevent the countdown.

7, the case is made of stainless steel, beautiful and durable.

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Jun 11 2014

Features Drinking Water Measuring Instrument( Water Meter), principles, introduction and use of traditional

Measurement of water flow meter. Mostly is the cumulative flow measurement of water. Generally divided into volumetric meter and velocity meter two. The accuracy is higher than, but the high requirement of the water quality, water containing impurities easily blocked. Recording water water meter, installed in the pipe, when the user when discharging water, table rotation pointer or wheel pointed out that through the water.

Drinking Water Measuring Instrument( Water Meter)

The internal structure of the traditional water meter from the outside to the inside can be divided into the shell, the inner core sleeve, three piece. The shell is made from pig iron, water inlet out through the lower part of the annular space shell, here called “ring room”. On top of the annular space of the “upper room” and the Drinking Water Measuring Instrument( Water Meter). One with a hole at the bottom of the filter sleeve, filter water impurities. The side of the sleeve has two rows of round holes, the hole position coincided with the shell on the annular chamber to, obviously, the lower is the water inlet, outlet row is. In particular, the two rows of holes are sideways along the tangential direction round. Note on two rows of holes in the opposite direction. Water from the discharge hole along the tangential direction of flow in, will form a rotating water flow, this is very important for water works. The inner core is divided into upper, middle, lower three layers, see from the glass of the window is the upper, only the pointer and dial. In fact, the key is lower, there is a plastic wheel, there are many plastic blade wheel, called “impeller”.

Impeller location right in the rotating stream formed by the lower hole of the casing, the impact of water flow blades, wheel torque is generated, so that the rotation of the impeller. The tap was greater, the more anxious, impeller will turn faster.

The impeller shaft vertical upward to the middle, there is a small gear on a shaft, use it and “decimal gear meshing, achieve” to total revolution. “The decimal number gear” role is when the single digit gears turn ten laps, ten digit gear will turn a circle. In other words, a digit gear rotates a circle, the ten digit gear will turn 1/10 times. A number of gear are active, rely on it to drive ten digit gear. In fact, every decade with two on gear, so that the rotation direction, wherein a pair of transmission ratio is 9:30, another is 10:30, the two together, the total transmission ratio is the two product, namely 0.099999, can approximate to 0.1. According to this calculation, if you want to read (seven digits before the decimal point read four black scale after the decimal point, read three red scale), have 12 pairs of gears. Plus some other purpose, in the middle and small space into 18 shaft and 34 gears, also can be a high density mounting. This type of meter with its simple and cheap, can be used without the need to repair in damp environment, without power supply, power failure does not affect the work of the advantages will still long service.

The term:

The minimum flow rate (Q1): showing the value of the maximum permissible error meets the minimum flow requirements of water meter.

The boundary flow (Q2): appeared in between, commonly used flow Q3 and minimum flow Q1 will flow range is divided into the two region specific maximum permissible error of “high” and “low” flow.

The commonly used flow (Q3): maximum flow rated working conditions. In this flow, water meter should work normally and meet the maximum permissible error.

Overload flow (Q4): water in a short time can meet the requirements of the maximum Rotary Volumetric Piston Water Meter, maximum flow in rated working conditions can still maintain the metrological characteristics.

Pressure loss (Δ P): at a given flow rate, head loss caused by the existence of water pipeline

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Jun 06 2014

Error of Rotary Piston Volumetric Type Water Meter, characteristics, the main technical parameters and Principles

Volumetric meter is also called the piston type water meter, is a constant flow type water meter. The national standard in the volumetric meter is defined as “installed in the closed pipe, by some to be a water meter chamber volume successive full known and discharge fluid and with fluid driven mechanism.

Rotary Piston Volumetric Type Water Meter

Volumetric meter with rotary piston type and disc type two series, when the water flow through the meter, the drive piston flow (circle

Rotating disc) (swing), and a piston cylinder (disk chamber) volume is constant, so, by counting the measured piston rotation mechanism

Turn (disc swing) times, can get through the Rotary Piston Volumetric Type Water Meter of water.

Product volume type water meter is the main rotary piston type water meter, see figure C.5 and figure C.6 appendix C. Disc type water meter is not used in the domestic, abroad also only a few countries America etc.. Rotary piston type water meter is generally small caliber specification, is characterized by measuring high level (up to C grade and D grade), small flow measurement capability, high sensitivity. At present is mainly used for the measurement of pipeline pure water, water purification water to produce drinking water meter water Limited by Share Ltd Ningbo and Ningbo Donghai instrument channel limited company as the representative, in the water meter diameter is 8, 15 and 20ram. Volumetric meter repair debugging complex, high requirement on quality, used in China has not yet been widely.

Under the action of water pressure, water from the lower water inlet into the measurement chamber, center 3 driven rotary piston 7 surround the measurement chamber shaft to rotate, and the water from the piston blank and piston and the measuring chamber wall surface formed by the air flows to the upper outlet, at the same time the piston rotates, connected by a rotating shaft 4 and shifting fork 5 and counting mechanism, so as long as the note of piston rotation times, can flow through the water volume.

Features and main technical parameters:

The Volumetric Piston Type Nylon Plastic Water Meter(Dry Register) type metering mechanism, high precision measurement, counting mechanism adopts a special liquid packaging, has the characteristics of clear reading of delicate appearance, water inlet is provided with a check valve can prevent backflow. According to user requirements can increase the converted into electrical signal output, can realize remote reading purpose.

Use:

The total record of potable water.

Conditions of use:

Temperature class: T30

Pressure rating: MAP10

Pressure loss grade: P63

The upstream flow sensitivity level: U5

Flow sensitivity level: D0

The maximum permissible error:

A) low area (Q1 ≤ Q < Q2) maximum permissible error of ± 5%

B) high (Q2 ≤ Q ≤ Q4) maximum permissible error of ± 2%

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May 23 2014

Rotary Piston Volumetric Dry Type Water Meter main features, design principles, as well as a major role in the performance advantages

Use:

Rotary piston type water meter (horizontal) used in family or a resident unit measurement potable cold (hot) water consumption.

Rotary Piston Volumetric Dry Type Water Meter

Characteristic.

Rotary Piston Volumetric Dry Type Water Meter for kiln product type water meter, the piston principle; high measurement precision, separated, counter with clear water data, reading is convenient; using high quality materials, stable and reliable performance; especially suitable for the pipe network water quality is better; the inlet is provided with a check valve can prevent reverse flow.

Advantage.

This table for the volumetric water meter, the piston principle

High precision measurement, separated, counter and water digital clear, easy reading

Using high quality materials, stable and reliable performance

Especially suitable for the water quality better

The Rotary Volumetric Piston Water Meter for rotary piston type metering structure, high measuring accuracy, up to GB/T778C, D, LXH-15E, separated from the counter and water, wheel and pointer combined display of easy reading, can keep clear dial. The 15B-40B is a vertical structure, counter with special liquid packaging, has clear reading, unique appearance and other characteristics, E4 type water meter counter can be approximate to 360 degree rotation, 8 digit wheel, the 1 pointer.

Conditions of use:

Cold water meter working temperature: +0.1 ℃ ~+35 ℃

The hot water meter of water wet: +0.1 ℃ ~+90 ℃

The working pressure is smaller than 1.0MPa

The maximum permissible error:

A) low area (Q1 ≤ Q < Q2) maximum permissible error of ± 5%

B) high (Q2 ≤ Q ≤ Q4) maximum permissible error of ± 2%

Features and main technical parameters:

The meter adopts rotary piston type metering mechanism, high precision measurement, counting mechanism adopts a special liquid packaging, has the characteristics of clear reading of delicate appearance, water inlet is provided with a check valve can prevent backflow. According to user requirements can increase the converted into electrical signal output, can realize remote reading purpose.

1. The water meter, technical parameters meet the national standard GB/T778.1 ~ 3-2007 (ISO4064-1 ~ 3:2005, IDT) regulations.

2 the series of water meters is DN15mm ~ DN20mm with plastic sheets are available.

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