Is the valve of the pressure gauge M20 1 5 with DN15 suitable

J23W is generally welded at both ends, and the outer diameter of the tube is DN15

The threads of the welded joints are M20*.

The needle valve is a valve that can be accurately adjusted, which is widely used, such as the cutting distance for flame cutting, and the knob for adjusting the flame temperature is the needle valve, which is an important part of the instrument measurement pipeline system, mainly including the globe valve and the ball valve, which is used to open or cut off the pipeline path. The spool of a needle valve is a very sharp cone that is inserted into the seat like a needle, hence the name.

1. Local pressure gauge The installation interface of the pressure gauge (the primary component number is PG on the PID diagram) is flanged, and the flange is generally selected HG T20615-2009 DN20, and the minimum pressure level is CLASS300, which is consistent with the process pipeline grade when there is no special requirement for higher than CLASS300. RF protrusion is used for flange face pressure class 600, and RJ face is used for pressure class 600. In the diaphragm pressure gauge on the vertical process pipeline, it is required to use a 90° elbow to turn the flange surface of the pressure gauge flange nozzle to vertical upward, and the flange surface shall not collide with the insulation layer of the pipeline, and at the same time, the construction space for bolts and nuts is left in the vertical direction.

3.Outside the flange face, within 150 mm in front of the flange, leave the space required for the installation of the 700 mm long instrument. 2. Pressure transmitter The installation interface of the general pressure transmitter (the primary component number is PT on the PID diagram) is flanged, and the flange adopts HG T20615-2009 DN20, and the minimum pressure level is CLASS300, which is consistent with the process pipeline grade when there is no special requirement for higher than CLASS300.

RF protrusion is used for flange face pressure class 600, and RJ face is used for pressure class 600. The flange nozzle of the single flange pressure transmitter adopts HG T20615-2009 DN50, and the lowest pressure level is CLASS300, which is consistent with the process pipeline grade when there is no special requirement for higher than CLASS300. Flange face pressure class 600 with RF raised surface we installed the local pressure gauge with the threaded interface with DN15 shut-off valve;

M20* thread should be DN15 valve.

Pressure gauge M20*, M14* need to be equipped with valves, pressure gauge elbows, joints are DN15.

The valve (famen) is a control component in the fluid transfer system, which has the functions of shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion or overflow pressure relief.

Valves for fluid control systems range from the simplest shut-off valves to the most complex valves used in automated control systems. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, slurries, oils, liquid metals and radioactive media. According to the material, the valve is also divided into cast iron valves, cast steel valves, stainless steel valves, etc.), chromium-molybdenum steel valves, chromium-molybdenum-vanadium steel valves, duplex steel valves, plastic valves, non-standard customized and other valve materials.

Valve is a device used to control the direction, pressure, and flow of fluid in a fluid system, and is a device that makes the medium (liquid, gas, powder) in the piping and equipment flow or stops and can control its flow.

The valve is a control component in the pipeline fluid transportation system, which is used to change the channel section and the direction of medium flow, and has the functions of diversion, cut-off, throttling, check, diversion or overflow pressure relief. Valves for fluid control, from the simplest globe valves to the most complex automatic control systems used in a variety of valves, its varieties and specifications, valves from the very small instrument valve to the diameter of 10m for industrial pipelines. It can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metal and radioactive fluids, the working pressure of the valve can be from ultra-high pressure to 1000MPa, and the working temperature is from ultra-low temperature of -270 to high temperature of 1430.

The control of the valve can adopt a variety of transmission modes, such as manual, electric, hydraulic, pneumatic, turbine, electromagnetic, electrohydraulic, pneumatic, spur gear, bevel gear drive, etc.; Under the action of pressure, temperature or other forms of sensing signals, it can act according to predetermined requirements, or simply open or close without relying on sensing signals, and the valve relies on a drive or automatic mechanism to make the opening and closing parts lift, slide, swing or slew movement, so as to change the size of its flow channel area to achieve its control function.

The more you talk about it, the more chaotic it is, M20* means that the thread diameter is 20mm, and the length of the threaded part is.

It should be equipped with a DN15 valve, which is a 4-point valve.

It should be equipped with a DN15 valve, which is a 4-point valve.

It should be equipped with a DN15 valve, which is a 4-point valve.

It should be equipped with a DN15 valve, which is a 4-point valve.

It should be equipped with a DN15 valve, which is a 4-point valve.

It should be equipped with a DN15 valve, which is a 4-point valve.

It should be equipped with a DN15 valve, which is a 4-point valve.

It should be equipped with a DN15 valve, which is a 4-point valve.

M20* means that the thread is 20mm, and the length of the threaded part should be equipped with a DN20 valve, that is, a 6-point valve.

4 points is DN15

m20* is a thread with an outer diameter of 20 mm and a pitch of mm. It should be 6 points, 4 points is 15 mm.

There is a special pressure gauge switch. With the M20, the M14 can be easily matched.

Pressure gauge M20*, M14* need to be equipped with valves, pressure gauge elbows, joints are DN15.

As for the specifications and models, different manufacturers have different representations.

The performance can meet the requirements.

The 4 points of the steel pipe are DN15 general diameter, which basically refers to the inner diameter, and the plastic pipe is generally DE20 refers to the outer diameter, and the thread M20 refers to the outer diameter, all of which are matched.

M20* is the fitting type of pressure gauge elbow and has no special meaning. Connectors are: M20*, etc.

There are two ways to express pressure: one is the pressure expressed by the absolute vacuum as the reference, which is called absolute pressure; The other is the pressure expressed in terms of atmospheric pressure, which is called relative pressure.

Since the pressure measured by most manometers is relative pressure, the relative pressure is also called gauge pressure. When the absolute pressure is less than the atmospheric pressure, it can be expressed as a value of less than one atmosphere of absolute pressure in the container. This is called "vacuum". Their relationship is as follows:

Absolute pressure = atmospheric pressure + relative pressure;

Vacuum = atmospheric pressure – absolute pressure.

The legal unit of pressure in China is Pa(N), which is called Pascal, or Pascal for short. Since this unit is too small, it is often used in units of 10 to 6 times MPA (megapascals).

M20 is the thread diameter and tooth pitch, which is the common joint size for pressure gauges in China.

There are also M20*, M16*, M14*, etc.

It should be in the manual, right?

It refers to the specification of the thread of the pressure gauge joint, and the outer diameter of this thread is 20mm, which is the screw moment of this thread.

1 2 dn15 quarter (4 cents) 3 4 dn20 six points (6 cents).

1′ dn25 1¼′ dn32 1½′ dn40

2′ dn50 2½′ dn65 3′ dn80

4′ dn100 5′ dn125 6′ dn150

8′ dn200 10′ dn250 12′ dn300

1 inch = mm = 8 cents.

DN15 four points, 20 six points, 25 one inch, 32 inches two, 40 and a half inches, 50 two inches, 63 two and a half inches, 75 three inches, 90 three and a half inches, 110 four and a half inches.

For a detailed comparison of how big an inch of water pipe should be used, see the following table:

1. Pipe fitting size inch millimeter comparison table.

2. A detailed comparison of how big the valve diameter (interface) should be used for the water pipe, see the following table:

3. A detailed comparison of how big the water pipe (large outer diameter) should be used for the valve caliber (interface), see the following table.

Valve DN15 20 25 32 40 50 63 75 90 110 The size comparison is as follows: the number of inches in front of DN corresponds to one by one.

Component diameter.

The nominal diameter of some parts such as flanges and bearings refers to the nominal diameter of the cylinder and head that matches it. DN2000 flange refers to the flange that matches the DN2000 cylinder (container) or head. DN2000 saddle refers to the saddle support that supports DN2000mm containers.

There are also some parts whose nominal diameters are indicated by the nominal diameters of the tubes that match them.

For example, the pipe flange, DN200 pipe flange refers to the pipe flange connected to the DN200mm pipe. In addition, the nominal diameter of some container parts refers to an important size in the structure, such as the sight hole of the sight glass, the shaft diameter of the stuffing box, etc. DN80 (DG80) sight glass, the diameter of which is 80mm.

The analysis is as follows:

DN20 (6 in charge).

DN25 (1 inch pipe), DN32 (1 inch 2 pipe), DN40 (1 inch half pipe), DN50 (2 inch pipe), DN63 (2 inch pipe), DN75 (2 and 1 2 inches), DN80 (3 inch pipe), DN110 (4 inch pipe) DN: The unit of internal diameter of the pipeline is mm mm, and the nominal diameter is also known as the nominal diameter. It is neither the outer diameter nor the inner diameter, which is stipulated by people in order to achieve standardization, so that pipes and fittings of the same diameter can be connected to each other, and have interoperability and interchangeability.

For example, DN50 is 50 mm, and the fractional valve is the internal diameter of the pipe in inches, 1 inch = centimeter.

Imperial Metric Comparison Table.

Inch metric (mm) cents.

1 4 dn 8 2 in charge.

1 2 dn15 quarter (4 dn) 3 4 dn20 six (6 d) 1 dn25

1¼′ dn32

1½′ dn40

2′ dn50

2½′ dn65

3′ dn80

4′ dn100

5′ dn125

6′ dn150

8′ dn200

10′ dn250

12′ dn300

1 inch = mm = 8 cents.

A valve size comparison table is given to you, if it is useful, please give it a like, or read this article to find out. "Valve Diameter (DN) and Pipe Diameter Size Comparison Table".

Pipe fitting size and valve diameter and inch comparison table:

2.Valve diameter dn (nominal diameter) corresponds to the outer diameter of the pipe (mm).

DN15 four points, 20 six points, 25 one inch, 32 inches two, 40 and a half inches, 50 two inches, 63 two and a half inches, 75 three inches.

For details of the valve size, please refer to the ** link.

The M20 male thread can be screwed into the G1 2 female thread, but only.

One or two turns will not be able to screw. For pressures above 1MPa, it is recommended to use M20 internal threads, the threads are completely consistent, and the number of turns screwed in is large.

It is best to add and transition a pressure gauge buffer pipe for the pressure gauge. It is used to cushion the instantaneous impact of the measured medium on the pressure gauge spring tube, and can reduce the temperature of the measured medium at the same time, and is a device to protect the pressure gauge.

The forms of pressure gauge buffer pipe are: O-shaped, U-shaped, etc.; Connectors are: M20*, etc.

Yes, there must be joints. Calibers are different.

Pressure gauge M20*, M14* need to be equipped with valves, pressure gauge elbows, joints are DN15.

As for the specifications and models, different manufacturers have different representations.

The performance can meet the requirements.

Not by standard, and I don't seem to have seen it in reality.