How to Install Cabinet-type Gas Control Point?

The following steps should be observed when install cabinet-type gas control point:

1.The regulator box should be hanged or mounted on the ground. To sling or put down the 
regulator box should be carefully when install it and can not make it incline and inversion.

2.It should be installed according to the direction of gas flow of regulator and opposite direction is
 forbidden. The flange should be parallel and can not force it in place.

3.The airtight test should be done after finishing installation to ensure the leakproofness of the 
connections of inlet and outlet.

4.To do airtight test for the regulator box’s outlet, test pressure should be 1.1 times as movement

 pressure of safety device of avoiding the outlet pressure is too high.

5. The installation of regulator box should meet the requirements of Code for Design of City Gas

 Engineering (GB50028-2006).

What is Cabinet-type Gas Control Point?

Cabinet-type gas control point have other names, such as gas pressure regulator box, 
gas pressure regulator cabinet, or cabinet gas control plant, gas pressure regulating station,
 etc. It was divided into two types, floor-type cabinet and wall-mounted type cabinet. 

No matter witch one, it should take care when install it.

Cabinet type gas control point is a procedure in the gas distribution and transmission
 system. It was widely used and promoted because of its features of compact structure, 

small floor space, cost saving, easy to use and maintain.

The main configuration :

1. Cabinet body

2. Inlet valve

3. Gas filter

4. Gas pressure regulator

5. Safety relief valve

6. Outlet valve

The optional configuration:

1. By-pass valve

2. Manometer

3. Electricity heat-tracing

4. Electricity meter

5. Explosion-proof switch

6. Manometer valve

7. Pressure transmitter

8. Temperature transmitter

9. Flow meter

The  internal construction of cabinet:

1+0 (one reduction line)

1+1 (one reduction line + by-pass)

2+0 (two reduction line)

2+1 (two reduction line + by-pass) 

You need to tell your supplier the flowing technical data When you choose a cabinet-type gas control point:

1. Inlet and outlet pressure 2.Flow capacity 3. Working temperature 4. The gas type

Where Can We Find Gas Pressure Regulators(Governor)?

Pressure regulator are used for our daily life and industrial applications. Specialty gas regulator applications are divided into two types.

The first is when the regulator is fastened to a gas cylinder using a Compressed Gas Association (CGA) fitting (or BS or DIN). For example, pressure regulators are used in gas grills to regulate propane pressure, in home furnaces to regulate natural gas, in medical/dental equipment regulate oxygen and anesthesia gases, in pneumatic automation systems to regulate compressed air, in engines to regulate fuel pressure, and in fuel cells to regulate hydrogen.

The second application is when a regulator is located in a gas line - providing a means to further reduce the line pressure. A line regulator is identified by having the inlet and outlet opposite of each other, and by a single gauge which is in the 12 o'clock position to indicate the reduced pressure. For example, pressure regulator are used for city/urban gas transmission or distribution system which supply natural gas for residential or other industry facilities, gas boiler, gas kiln, gas generator, heat burner, etc.

How to Chose a Proper Gas Pressure Regulator (Governor)?

Many factors should be considered when choosing a proper gas pressure regulator(gas controller).

From the angle of gas type:

1.General Gas Use. For general use, regulators of brass construction with elastomeric diaphragms will give good service in noncorrosive service where slight contamination or diffusion from an elastomeric diaphragm is not important. Brass regulators with stainless steel diaphragms prevent air diffusion and adsorption of gases on the diaphragm. This is particularly important with low concentration mixtures of hydrocarbons in which the trace component may be adsorbed on the elastomeric diaphragm.

The gas regulator must be constructed using materials suited to the application. Industrial general purpose regulators are often constructed with either Buna-N or Neoprene diaphragms. Regulators with Buna-N or Neoprene diaphragms are not suitable for GC analysis that can be affected by the diffusion of atmospheric oxygen through the elastomer diaphragm or the outgassing of monomers and dimers from the elastomer. In fact, laboratories that perform temperature programmed analysis are faced with excessive baseline drift and large unresolved peaks due to this diffusion and outgassing.

 High-Purity Gas Service. 
The ideal construction for high-purity gas service is a gas regulator that has a stainless steel diaphragm. Such regulators are not contaminating and assure satisfactory use for all applications of noncorrosive and mildly corrosive gases. Regulators for corrosive gases must be selected from those recommended with each gas listing.

A gas regulator equipped with a stainless steel diaphragm has several advantages over the elastomeric type. It does not outgas organic materials and it also prevents the diffusion of atmospheric oxygen into the carrier gas. Both Buna-N and Neoprene diaphragms are permeable to oxygen. The chemical potential of oxygen between the carrier gas and the atmosphere provides sufficient driving force for oxygen to intrude the carrier gas through a permeable diaphragm. 

What is City Gate /Transmission/Distribution gate?

As we know, natural gas was used in every part of our daily life,the using of water heater, some of appliance can not without natural gas. But the natural gas from the source of the natural gas well to our home need a long distance and many procedures, the pressure of natural gas have been in a very high condition,although the gas pressure get our home, we can not use it because of the high pressure, so it need a pressure reduction process, the city gate station was appeared at the moment.

High-pressure transmission pipelines move the gas from the production company’s cleaning plants to gas distribution companies for sale to consumers. Regulators control the high-pressure gas as it moves along the pipeline. At city gate stations and farm taps, regulators reduce the pipeline gas pressure to distribution pressure. To provide a constant, measurable gas pressure, service regulators control the gas pressure before it enters the customer’s residence or building. 

City gate station is a gas reduction station combined various valve, filter, safety device, pipeline, gas pressure regulator, manometer and other spare parts. According to the research of Hengshui Runfeng Gas Equipment Co., Ltd. The gas pressure regulator is the key part in the gas gate station to regulate the natural gas pressure. The performance of the gas pressure regulator directly affect the result of pressure reduction. Filter is also very important, it will lead to the fail work of the gas pressure regulator (governor) if there are impurities in the natural gas. The best valve chosen for inlet and outlet valve is ball valve which have the better sealing. 

How to Adjust a Natural Gas Regulator of homeowner?

It is necessary to adjust Natural gas pressure regulator because of the pressure changes in the system or the result caused by the incorrect adjustment of service personnel. In such cases, the pilot lights may go out, the appliance flames may be slow to ignite or not burn properly and the starting of one appliance may affect the operation of other appliances. Such problems may be caused by an incorrect pressure setting and the main regulator can be adjusted to see if such pressure changes solve the problem. 

Instructions

1

Locate the main natural gas pressure regulator (governor). The outside regulator before the meter is owned by the gas utility and must not be touched. There may also be regulators attached to individual appliances but these are usually not adjustable. The regulator to be adjusted is located close to the entry point of the gas mains into the house and after the gas meter. This regulator is owned by the homeowner and he is responsible for it.

2

Shut off the gas. Attach the pressure gauge to the outlet tap of the regulator. Turn on the gas and read the pressure. Switch on various appliances and appliance combinations and read the pressure for each one. The pressure should remain constant. If it varies for certain appliances or combination of appliances, adjusting the pressure may solve the problem.

3

Pull off the regulator cap. There is a spring and an adjusting screw underneath. Usually turning the screw clockwise increases outlet pressure but the direction of adjustment is marked on the regulator. Turn the screw a little to make a small pressure increase adjustment as seen on the pressure gauge. The gas pressure is only slightly above atmospheric pressure so small adjustments have a large effect. Recreate the appliance configurations which had the greatest pressure variations and see if there is an improvement. Make further adjustments as necessary to obtain a fairly constant pressure. Switch off the gas. Remove the pressure gauge and switch the gas back on. Replace the protective cap.

Note: All the adjustment should be on the base of the gas pressure regulator is 

in the good conditions, the gas pressure regulator should be inspected if the spring and the valve body was rusted or corroded by moisture before adjustment.

What Causes a Natural Gas Regulator to Fail?

A explosion occurred at one of chemical area in China 2013. The safety using of chemical product acquired max. attention by Chinese government. Natural gas is clean energy with efficient utilization, but it is also dangerous. Natural gas pressure regulator is a key step of ensuring the safety using of natural gas. A gas regulator is a mechanical device. Like all mechanical devices, it wears out and eventually fails. Before this happens, maintenance crews must repair or replace it. If the regulator starts leaking gas, explosions can occur, leading to disastrous consequences. Understanding the reasons for failure is the first step in regulator safety, and to taking the steps to avoiding such a disaster.

Internal Corrosion by Moisture

Gas regulators have very small and intricate internal parts. If moisture enters the regulator, it starts to corrode these parts. For example, a needle valve has a tip that is actually about the size of a needle; if corrosion sets in, the tip can become rusted and fall off. Additionally, internal springs are made of steel, which can rust and break. Third, moisture can be dissolved in the gas itself. The United States Department of Transportation points out that water can enter a regulator through an exposed vent hole. 

Incorrect Gas Pressure

Gas regulators are designed to function when the pressure is within a certain range. If the pressure becomes too great, a relief valve is supposed to vent excess gas to open air. If the relief valve is frozen shut, excess gas will blow out gaskets and seals, leading to unregulated gas pouring out into the air.

Locking Up by Improper Valve Closure

The expert investigation and testing group Intertek gives an example of how improper valve closure caused a building explosion. During their investigation of the explosion, they discovered the regulators had gone into lock-up when the wrong set of shut-off gas valves had been closed. This had happened when exterminators, planning to fumigate the building by tenting, closed off the meter valves of apartment units, downstream in flow from the regulators, rather than the main valve, upstream in flow.The back pressure caused the regulators to lock up, blowing out their diaphragms. When the diaphragms blew out, natural gas leaked unabated into the tented building. Sparks from fans where suspected as the ignition source. 

Lack of Maintenance

Lack of maintenance can be another cause of gas regulator failure. Because a regulator is a mechanical device, its parts can wear out. Needle valves and valve seats become dull, and rubber diaphragms become brittle and crack and spring lose their tension. Hengshui Runfeng Gas Equipment Company notes that all gas regulators have to be inspected and rebuilt on a periodic basis. The manufacturer specifies the maintenance interval. Failure by lack of maintenance is easily preventable if a regular inspection schedule is followed.

If you can notice the above reasons of failing to work of gas pressure regulator (governor), the dangerous could be avoided. 

Why do we use Natural Gas Regulator？

Natural gas become more and more important in our daily life or in industry, this kind of clean energy was advocated in most of countries of the world. So how to solve the utility of the natural gas was in a
important position now and the natural gas regulator is necessary in the uses of natural gas.

1. Pressure Reduction

Two tasks should be complished in the utility of natural gas regulator relating to how natural gas is delivered to your home. The first task is pressure reduction. The gas utility company delivers natural gas to homes through a vast network of pressurized pipes that travel great distances between gas collection sites and the cities and towns that consume the gas. The utility company pressurizes the gas lines to push the fuel through it's network of pipes to reach your home. Once the gas reaches your home, the gas pressure must be reduced to a level that is useful to your appliances. The vast majority of residential natural gas regulators are known as "self-operated" or "direct-operated" pressure reducing valves. The name stems from the fact that the regulator uses it's own internal spring valve mechanism to reduce pressure and needs no other form of energy to operate. Direct-operated pressure reducing regulators precisely adjust the pressure of the gas through a valve that is backed by an adjustable spring. The spring valve pushes against the opposing pressure in the line and allows the valve to open only enough to pressurize the downstream house side to what is needed.

2. Pressure Regulation

The second task of a natural gas regulator is to normalize the gas pressure entering the home. Gas delivery piping outside the home is not only frequently delivered at a higher pressure than needed, the pressure may also fluctuate. Furthermore, as different appliances are used in the home, gas pressure in the house piping to the appliances could vary and/or diminish completely if it weren't for the gas regulator. A natural gas regulator normalizes the gas pressure by sensing the gas pressure downstream of the regulator and adjusting it's spring valve accordingly to deliver a constant flow of gas. The regulator accomplishes this by a mechanical connection between it's spring valve and a diaphragm chamber that is filled with gas from the outlet (downstream) side. As the downstream side pressure decreases, the diaphragm pushes the spring valve to allow more gas from the inlet side in to normalize the pressure.

3. Atmospheric Pressure and Venting

A natural gas regulator works by sensing downstream pressure in the piping and registering it with a diaphragm that is balanced against outside atmospheric pressure. As mentioned previously, the diaphragm is connected to a spring valve that regulates the amount of gas passing through the valve and thus the amount of gas pressure in the home. The relationship to atmospheric pressure is important, because this is what allows the regulator to sense the downstream pressure. In the event that downstream pressure exceeds a preset level, the regulator maintains constant pressure by allowing excess gas to escape through the diaphragm mechanism. Since atmospheric pressure depends on what elevation above sea level your home is located, a natural gas regulator typically is adjusted by the gas company so that it is tuned to the local atmospheric pressure and inlet gas pressure so that it can successfully regulate the gas pressure in your home.


The technology of gas pressure regulator should be innovated so that the effect of natural gas utility will be more better. RTZ-AQ /FQ series gas pressure regulator will be a good choice.