The maintenance of regulator

The maintenance of regulator
A, With the gas alarm equipment (or soap) to check whether the regulator external leakage. (Note: After the residual odor emission may cause gas alarm equipment alarm.)
B, Check the closing pressure of regulator
Slowly close the regulator outlet valve, connect pressure gauge in the regulator outlet test port, and open the switch. record closed pressure value after three minutes, check whether within the normal range. It is not need to repair when gas regulator closed pressure under normal circumstances.
C, Cleaning the external of regulator.
D, Cleaning the internal of regulator.
When the gas medium containing heavier dirt, the inside of gas pressure regulator should be cleaned and maintained regularly. According gas quality and use, every 3 to 6 months, swelling or commutation rubber aging such as: valve seals, diaphragms, O-rings, etc. should be checked or replaced regularly to ensure safety and normal supply to use.
When the media is artificial gas, it is recommended maintenance cycle shortened to 1-3 months. operation and management departments should be based on gas quality, appropriate adjustments to the maintenance cycle.
E, Before repairs should shutdown the inlet and outlet valves of the regulator, vent off pressure; reloading should be careful not to damage such as valve port, film and other parts; assembled the various moving parts should be checked whether the flexible movement ; repair assembly finished, according to the method of ventilation operation to set after repairs, and use soap to check all connection sealing parts with or without external leakage.

The working principle of safety shut-off valve and safety tossing in valve

The working principle of safety shut-off valve
When the signal pressure disorders, more than (overpressure type) or below (loss of pressure type) cut-off valve pressure setting, sensors in the pneumatic membrane drives the collision block move, make the trip mechanism movement, in a closed spring, under the action of the main valve disc quickly close the valve port, to protect the role of the voltage regulator and measuring instruments and other downstream equipment.

The working principle of
As used in the main film inferior vena surge tank (stand) export pressure to tossing in the start-up pressure, it overcome the regulating spring force drives the pull rod upward movement, under the action of the lever, the stem moves down to open the main valve disc, discharge gas. When the pressure for gas emissions fell to a start-up pressure setting, stem up, under the action of the disc in a reset spring valve mouth closed.

According to the structure, regulator can be divided in the form of leveraged and balanced spool type two kinds

Rod series regulator is passed acting force through the lever force, the regulator outlet pressure is set by adjusting the spring. When the flow increases downstream of the regulator, outlet pressure P2 downward trend, then, under the regulation of the main pressure chamber is decreased, the film is moved downward so that the main action of the spring in the regulation; leverage in the valve away from the valve stem to drive the valve mouth, so that the regulator is opened, thereby increasing the flow through the valve port to maintain constant downstream pressure. When the regulator downstream flow decreases, its role and the above process is reversed until the regulator is closed.

Balanced spool-type regulator 

The membrane (M) by the operation of the spool (S) transmitted to the valve (P), the outlet pressure by the pressure sensing pipe is connected to film (M), producing a spring force (D) counter. To touch the skin of the gas pressure shut-off valve, and then I want to open the valve spring pressure (fault both being opened). 

When no airflow, the spring valve is fully open. when the overpressure regulator closed, the valve pad (Q) and the valve (P) is integral to ensure complete sealing. Against the action of the spring when the outlet pressure balance, a film of a spool valve combinations remain intact, while the outlet pressure is in line with the spring set point. Traffic demand increases, the outlet pressure drop is greater than the spring outlet pressure, the valve opens, until the resumption of exports until the set pressure. When the outlet pressure increases, the process is reversed.

Inlet pressure operating in balancing chamber (B) , Under various operating conditionsable, to accurately, perfect balancing switch valve (Q) 

In the tuning period, should be very slow and extreme caution to open shut-off valve to prevent the strong airflow to damage regulator downstream equipment under any circumstances

Steps are as follows: 

1, in accordance with the system characteristics, step by step so that a small amount of gas flow. So, open the exhaust downstream of the regulator wire blocking, if difficult, then open the outlet valve a little bit. 

2, slowly open the inlet valve a little bit. 

3, resetting the shut-off valve (if any) 

4, until the outlet pressure stable, fully open the inlet valve slowly at first, then slowly open the outlet valve completely. 

Setting is done during the operation of the regulator, the inlet valve is slightly opened, and the regulator outlet end of the exhaust nozzle, the adjuster (L or T) to increase the pressure to the rotation clockwise or counterclockwise rotation decreases.

Gas Regulator Box Product Overview and Technical Features

Gas regulator box Product Overview and Technical Features

Product Overview:

1,The main configuration:

a. The main regulator use Imported or domestic host

b. High precision filter, filtering precision can reach 5 microns, its operation is simple, safe and efficient.

c. The overpressure safety shut-off valve, manual reset, safe and reliable.

d. Tossing in overpressure safety valve, automatic reset, and guarantee the continuous gas supply

e. Imports also ball valve, butterfly valve, also can choose according to user requirements

2, Gas regulator box and simple structure, convenient maintenance, can be assembled into a single Luke by-pass two-way adjustable dividers.

3, Adjustable dividers is suitable for natural gas, the artificial coal gas and liquefied petroleum gas, mine gas as the medium of gas pressure regulating residents.

4, Before delivery all pass strict air test, ensure the safety of the user gas supply

5, Gas pressure regulating box body is made of steel plate welded, glass fiber reinforced plastic, after choi steel and other materials

6, According to user requirements for different requirements of the closet

Technical feature:

Inlet pressure range: P10.02-0.4MPa
Outlet pressure range: P21.5-5KPa

Flow-rate range：Q=10、50、80、100、150、300、400、600、800、1000、2000、3000、4000Nm3/h

The connection path： DN20、DN40、DN50、DN80、DN100、DN150、DN200、DN250、DN300 (PN1.6 flange)

Install and use：

1， Adjustable dividers should install, suspension or sit when installation should drop spike light, cannot tilt and inversion.

2，Connection, the import and export shall be installed according to the voltage regulator for airflow direction and should not be inverted.

3，Installed, should be air tight test, ensure that the connection part of import and export air tightness.

4，Adjustable dividers export air test, shall not be more than four times the size of the closing pressure.

5，The install distance of gas regulator box should accord with a standard to ask.

Is a gas regulator mechanical?

1. On One Hand: Most Are Mechanical

A standard gas pressure regulator is made up of springs and rubber diaphragms, according to
 GlobalSpec, an engineering database. The regulator responds to pressure mechanically, by
 physically pressing against the springs and diaphragms, causing them to move and open or
 close valves. This description can also be found in the technical papers of many companies
 selling gas regulators.

2. On the Other: Some Are Electrical

Electrical gas regulators are also available. The library of Oklahoma State University has 
descriptions of gas pressure regulators that run on electrical parts, where the valve is 
operated by a solenoid instead of a spring.

3. Bottom Line

The vast majority of technical data sheets from gas regulator manufacturers such as 
Fisher Regulators describe exclusively mechanical regulators. Examples of electrical 
regulators are few and far between. Gas regulators are almost all mechanical.

The comparison between Runfeng regulator and Fisher regulator

1.Runfeng RTZ-50AQ compared with Fisher RTZ-50SN

Technical Data	RTZ-50AQ	RTZ-50SN
Inlet Pressure	0.02~0.8 Mpa	0.02~0.4Mpa
Outlet Pressure	2.0~300 Kpa	1~20Kpa
Accuracy Class	AC5	±10%
Shut-off Accuracy	≤5%	≤5%
Lock-up Pressure Class	SG10	≤1.25pa
Flow Rate	0~19200m³/h	0~16000m³/h

2. Structure Comparison

The inter regulation structure of Fisher direct-acting regulator (RTZ-50SN) adopt balance 

valve element structure.

Runfeng RTZ-50AQ regulator adopt compound balance valve element structure, this kind of

 structure improve the accuracy of control pressure, it can stabilize the after pressure

 at a certain range well. RTZ-50AQ regulator with safety shut-off valve.

3. Performance Curve Comparison

                        RTZ-50AQ Gas Regulator Flow Capacity Curve

                           RTZ-50SN Gas Regulator Flow Capacity Curve

Gas regulator, so that the world has entered the era of natural gas

The use of the artificial coal gas and popularize can make residents from the smoky
stoves and shoulder heavy manual labor freed of portable gas, has brought great
convenience. Artificial coal gas, however, although convenient, but its impurities,
low calorific value, more disadvantages condemned it can only act as a transitional
role in city gas, the fuel is bound to be replaced by green energy destiny.

Replacement of natural gas is a complicated systematic project, the need for all pipe,
valves, regulators, and indoor facilities to conduct a comprehensive survey,
transformation. In order to successfully promote the replacement work, the gas
company set up headquarters replacement work, pipeline survey group, information
publishing group, pipe network transformation group, replacement diffuse group,
improve network connection group, material supply group, the China user security
inspection team, big customers table with the transformation of the group, a number
of professional services group reconstruction team stove, gas appliance sales and
service groups, and other logistics services group, division of labor between the various
groups, the replacement of natural gas to provide a strong guarantee.

Natural gas era has fully come, along with the popularity of natural gas, will greatly
improve the urban ecological civilization, and improve the quality of life of the people.
We can expect, sky will be bluer, the air will be more fresh.