Manufacturer: LLC EPO "Signal"
The design is made in a combined version with a built-in safety valve. The operating conditions of the regulators must comply with the climatic version UHL 2 in accordance with GOST 15150-69 for operation at temperatures environment from -40 ˚С to + 60 ˚С.
Device and principle of operation
The regulator is manufactured in 2 versions:
- with output low pressure (N);
- with outlet high pressure (B).
Gas pressure regulators RDG-N, RDG-V are composed of: actuator 2, control regulator 9 (hereinafter referred to as the pilot), control mechanism 17, throttles 10, 19 in accordance with Fig. 4.20. Actuator 2 (see Fig. 4.20) automatically with the help of pilot 9 maintains a given output pressure in all gas flow modes by changing the gap between valve 4 and seat 3.
The actuator 2 consists of a body with a seat 3, a membrane with a rigid center 6, clamped around the perimeter between the top and bottom covers; the rigid center, through the pusher and rod 5, transmits the movement of the membrane to the valve 4, thereby changing the flow rate and outlet pressure of the regulator.
Rice. 4.20. Scheme of the gas pressure regulator RDG-N (RDG-V): 1 - shut-off valve; 2 - executive device; 3 - saddle; 4 - working valve; 5 - rod; 6 - membrane of the actuator; 7 - fitting of the actuator; 8 - inlet pressure pipeline; 9 - control regulator (low or high pressure); 10 - throttle control regulator; 11 - control pressure pipeline; 12 - cut-off valve spring; 13 - shut-off valve lever; 14 - rod of the control mechanism; 15 - adjusting screw of a large spring; 16 - adjusting screw of a small spring; 17 - control mechanism; 18 - fitting of the control mechanism; 19 - throttle actuator; 20 - fitting of the control regulator; 21 - bracket; 22 - large spring; 23 - small spring; 24 - bracket; 25 - bracket; 26 - screw; 27 - bracket
The actuator 2 consists of a body with a seat 3, a membrane with a rigid center 6, clamped around the perimeter between the top and bottom covers; the rigid center, through the pusher and rod 5, transmits the movement of the membrane to the valve 4, thereby changing the flow rate and outlet pressure of the regulator.
Pilot low pressure 9 (see Fig. 4.21) consists of three functional blocks: a filter, a stabilizer and a pilot directly, mounted in one housing. The high pressure pilot does not use a stabilizer.
The filter is mounted on the pilot body and provides fine cleaning working environment through a filter mesh 5. Designed to ensure continuous operation of the pilot. The stabilizer is mounted on the body and provides a reduction in the inlet pressure coming through the inlet pipeline to the value required for stable operation pilot and actuator. The stabilizer consists of a valve 6 with a seat, a membrane assembly 7 and a spring 8. The pilot itself is mounted in the body and serves to control the actuator of the regulator. The control is carried out by creating a control pressure by the pilot, which flows through the connecting pipeline 11 into the control cavity of the actuator. The pilot consists of a valve 1, a membrane unit 2 with a membrane 10, an adjusting spring 3, a plate 4, an adjusting screw 9 and a pilot throttle 11.
Rice. 4.21. Diagram of the device of the control regulator: 1 - pilot valve; 2 - membrane pilot assembly; 3 - adjusting spring; 5 - filter mesh; 6 - stabilizer valve; 7 - membrane stabilizer assembly; 8 - stabilizer spring; 9 - adjusting screw; 10 - pilot membrane; 11, 12 - throttle
Adjustable chokes 10, 28 and 19 (see Fig. 4.20) are used to adjust the smooth (without self-oscillations) operation of the regulator. The throttle consists of a fitting and a needle screwed into it. By screwing in and out of the needle, the throughput of the nozzle changes, thereby changing the gas flow through the throttle and the pressure drop across it. By increasing the pressure drop across the throttle, self-oscillations of the outlet pressure are eliminated.
The shut-off valve control mechanism 17 is intended for continuous monitoring of the outlet pressure and issuing a signal for actuation of the shut-off valve in the actuator in case of emergency increase and decrease in the outlet pressure above the allowable setpoints.
The control mechanism consists of two detachable covers, a membrane assembly clamped around the perimeter by covers, a rod of the control mechanism 14, large 22 and small 23 springs that balance the effect of the outlet pressure pulse on the membrane.
The regulator works as follows.
The gas enters the input of the actuator 2 and the control regulator 9 (see Fig. 4.20).
The control regulator generates a control pressure, which is supplied through the pipeline 11 through the throttle 19 into the submembrane cavity of the actuator.
In the steady state, when the gas flow rate is constant, the control regulator maintains a constant control pressure in the submembrane cavity. As a result, the valve 4 is set to the corresponding fixed position, which determines the constancy of the output pressure of the regulator. The outlet pressure range is set by adjusting screw 9 (see Fig. 4.21).
The operation of the regulator when the flow rate changes.
Before starting the regulator, when the flow rate is zero, the valve 4 is closed, since the pressure drop between the submembrane and supramembrane cavities is zero. At the moment of opening the regulator, the pressure in the supra-membrane cavity of the actuator will drop, as a result of which a pressure drop will appear between the sub-membrane and supra-membrane cavities. As a result, the membrane with rod 5 and valve 4 will move, and valve 4 will open the passage of gas through the resulting gap between the valve and the seat, and the previously set outlet pressure will be established.
With a further increase in flow, the pressure drop between the above-mentioned cavities of the actuator increases, the valve will open even more, while the outlet pressure will be maintained at a previously set value.
With a decrease in gas flow, the pressure drop between the cavities of the actuator decreases, as a result of which the passage of gas through the decreasing gap between the valve and the seat decreases. The regulator will then maintain the previously set outlet pressure.
In the event of an emergency increase or decrease in the output pressure, the membrane of the control mechanism 17 moves to the left or right, the shut-off valve lever comes out of contact with the stem 14 of the control mechanism, the shut-off valve, under the action of spring 12, blocks the gas flow to the regulator.
Rice. 4.22. Scheme of connecting impulse pipes to the regulator: 1, 2, 3 - impulse tubes (pipeline DN 8, length - in place, material - pipe DKRNM8x1 GOST617-2006); 4 - union nut М14x1-7Н with nipple; 5, 6 - welded fitting M14x1 - 6e, cutting the end of the fitting (see Fig. 4.20); 7 - distributor (pipe 1/4", 3/4")
Specifications
| RDG-50N | RDG-50V | RDG-80N | RDG-80V | RDG-150N | RDG-150V | |
| Working environment | natural gas according to GOST 5542-87 | |||||
| Inlet pressure range, MPa | 0,05-1,2 | 0,1-1,2 | 0,05-1,2 | 0,1-1,2 | 0,05-1,2 | 0,1-1,2 |
| Outlet pressure setting range, kPa | 1,5-60 | 60-600 | 1,5-60 | 60-600 | 1,5-60 | 60-600 |
| Maximum throughput, m3/h, not less than | 7100 | 7100 | 14600 | 14600 | 32000 | 32000 |
| Uneven regulation, % | ±20 | ±20 | ±20 | ±20 | ±20 | ±20 |
| Actuation pressure of the control mechanism, MPa: when output pressure drops when output pressure rises at R out. = 0.003 MPa |
(0.15-0.5) Рout. (1.25-1.5) Рout. 0,0045-0,0075 |
|||||
| Seat diameter, mm | 30, 35, 40, 45 | 30, 35, 40, 45 | 65 | 65 | 98 | 98 |
| Diameter of the inlet and outlet connecting pipe, mm | 50 | 50 | 80 | 80 | 150 | 150 |
| Accession | flange according to GOST 12820-80 | |||||
| Overall dimensions, mm | 670x530x400 | 670x530x400 | 700x600x460 | 700x600x460 | 800x800x650 | 800x800x650 |
| Construction length, mm | 365 | 365 | 502 | 502 | 570 | 570 |
| Weight, kg | 42 | 42 | 85 | 85 | 153 | 150 |
Gas pressure regulator- a device that controls the hydraulic mode of operation of the gas distribution.
Regulators work in automatic mode, supporting constant level pressure, regardless of the intensity of gas consumption. In the process of adjusting the initial pressure, it decreases, and this effect is achieved by changing the opening throttle controller. As a result, a change in the hydraulic resistance exerted on the passing gas flow can be observed.
Before buying a gas pressure regulator, it is worth considering that the devices are divided into two types - those that include before themselves and those that include after themselves.
Gas pressure regulator device
As part of the automatic gas pressure regulator There is a regulatory body and an executive mechanism. The main part of such a mechanism is represented by a sensitive element. And its task is to compare the signals that the master receives. The actuator converts the command signal into action, which means that the moving part of the working body begins to move from the energy that is obtained from the working environment.
If the effort is developed by an element of the regulator, and it is recognized as large, then independent implementation is possible. control function. Such regulators are called direct acting devices. To increase the permutation effort and obtain more accurate regulation, it is important to install an amplifier, namely a device that is called a "pilot". The meter controls the amplifier, which achieves the effect of amplification due to the infinite interaction transmitted to the regulator. Since it conducts gas throttling, it is often called a throttling.
The main purpose of the liquefied gas pressure regulator is to maintain the set point of the gas network. This means that the automatic control system is often considered as an object and a regulator.
The principle of operation of automatic gas regulators is based on pressure deviation. The difference between the values is the mismatch. It can occur as a result of excitation, or as a result of a change in the inlet gas pressure regulator.
With the correct selection of the regulator, it is possible to achieve the stability of the system, which means that it can easily return to its original state.
Types of gas pressure regulators
Taking into account the regulation law, it should be borne in mind that house gas pressure regulators are:
- Astatic.
In astatic gas regulators the force from the load acts on the membrane. The reaction force is the gain that is perceived by the membrane from the outlet pressure. If gas extraction from the network is increased, then the pressure will decrease and this will cause an imbalance. - Static.
Friction and backlash often lead to unstable control. But in order to make this process more stable, it is necessary to introduce into the regulator feedback rigid type. Such regulators are called static, since when they are adjusted, the nominal and actual values differ little. Such regulators are often uneven. - Isodromic.
An isodromic household gas pressure regulator, when the pressure deviates, will move the pressure by an amount that is proportional to the deviation. But, if the pressure is not normalized, then the regulating body will move until the set value is fully reached.
On the PromGaz Postavka website, you can buy gas pressure regulator with delivery.
- Throttle overmembrane RDG
- Throttle submembrane RDG
- Shut-off valve RDG
- RDG pilot valve
- Valve working RDG
- Stabilizer valve RDG
- Sealing ring RDG
- Membrane of the RDG control mechanism
- RDG Pilot Membrane
- Membrane working RDG
- Membrane stabilizer RDG
- Shut-off valve spring RDG
- RDG pilot valve spring
- Spring control mechanism large RDG
- Pilot spring RDG
- RDG stabilizer spring
- Spring control mechanism small RDG
- RDG Pilot's Saddle
- Regulator seat RDG
- Shut-off valve seal RDG
- RDG Regulator Filter
- Valve stem working RDG
- The rod of the control mechanism RDG
- Pilot RDG
- RDG stabilizer
RDG-50N without much effort can be found in many organizations involved in the supply gas equipment. But it should be noted that not everyone understands the intricacies of the operation of the gearbox and the differences in the main components. If you decide repair kit RDG-50N order, then first of all it is necessary to clarify the manufacturer of this product and preferably the year of its production. The point is that, on the face of it, it can be said that the regulators different manufacturers practically do not differ, but the components can have significant differences. With regard to RTI, for example, membrane working RDG-50 everyone has the same. The only difference between them is the material.
Some manufacturers make membranes from membrane web, and some make them cast. The same goes for pilot membrane RDG-50 And stabilizer membrane RDG-50. But with the membranes of the pilot, not everything is so simple. There are several pilot designs. The round membrane of the pilot RDG-50 and the square membrane of the pilot differ not only in shape, but also in size. It is worth paying attention to the throttles.
Throttle RDG-50 may have different designs. There was a case when the customer provided the name of the plant, but did not specify the year of production. When spare parts for RDG-50 were put it turned out that the chokes are not suitable. They turned out to have experimental regulators, parts for which no one had made for a long time. Saddle RDG-50 Rarely anyone differs, but still there are different. When ordering a saddle, as well as valve RDG-50, it is necessary to specify the diameter.
Not a little important aspect when choosing spare parts is the material from which they are
are made and the production process itself also leaves its mark on the quality of parts. For example, if valve seal RDG-50 if it is not pressed with high quality, then such a valve will not work for a long time and will have to be repaired again. Manufacturers are constantly working on the design of their regulators. This is due to the desire to reduce costs, as well as improve the quality and accuracy of work. Technical specialists develop new designs and this leads to changes in the internal parts of the regulators.
Regulators RDG-50, RDG-80 and RDG-150 have a similar design and the difference between the repair kits is the size of the parts. Eg membrane working RDG-150 significantly more than membrane working RDG-80. The same is true with valves. Due to the difference in passage diameters and, accordingly, the throughput valve working RDG-150 more than valve working RDG-80, and that, in turn, is larger than the working valve RDG-50. Such components as the pilot and stabilizer from one manufacturer do not differ for regulators with different diameters. High regulators do not have a stabilizer in their design, so the cost of a repair kit will be lower. At repair kit RDG-150 price the highest among the three modifications, repair kit RDG-80 price intermediate and, accordingly, the price of the repair kit for the RDG-50 is the lowest.
We provide an opportunity repair kit RDG buy with delivery in Serpukhov, Odintsovo, Krasnogorsk, Khimki, Balashikha, Domodedovo, Lyubertsy, Podolsk, Chekhov, Stupino, Ramenskoye, Korolev, Pushkino, Noginsk, Tambov, Almaty, Atyrau, Aktau, Moscow, Novosibirsk, Nizhny Novgorod, Omsk, Tomsk, Yaroslavl, Petrozavodsk, Kazan, Aktobe, Karaganda, Ulan-Ude, Vladivostok, Khabarovsk, Penza, Kaluga, Volgograd, Chelyabinsk, Yekaterinburg, Ivanovo, Kstovo, Cheboksary, Ryazan, Dzerzhinsk, Rostov-on-Don, Perm , St. Petersburg, Kursk, Tula, Tver, Samara, Voronezh, Naberezhnye Chelny, Tyumen, Gatchina, Vladimir, Veliky Novgorod, Krasnoyarsk, Volzhsky, Belgorod, Rybinsk, Barnaul, Smolensk, Samara, Shchekino, Kemerovo, Orenburg, Surgut, Khasavyurt , Makhachkala, Grozny, Kaspiysk, Ufa, Miass, Krasnodar, Stavropol, Tolyatti, Stary Oskol, Sterlitamak, Ishimbay, Rudny, Bryansk, Kostanay, Uralsk Sochi, Novokuznetsk, Astana, Amursk, Angarsk, Norilsk, Nizhnekamsk, Elista, Biysk, Murmansk , Vladikavkaz, Khanty-Mansiysk, Nalchik, Orel, Kaliningrad, Yoshkar-Ola. To do this, you need to contact us in any way convenient for you.
Regulator pressure gas RDUK it is used in various hydraulic fracturing and installations as the main device for reducing the working gas pressure and maintaining it at a given level, regardless of inlet pressure fluctuations and its flow rate. Kazantsev's universal gas pressure regulator, as the abbreviation of this device stands for, is equipped with gas supply systems for residential buildings and communal facilities, industrial and agricultural complexes.
Advantages of the RDUK regulator
Regulator pressure gas RDUK It has the following list of advantages, for which it is valued by its customers:
- Possibility of settings of values of output pressure in a wide range;
- Exceptional throughput;
- Insignificant weight and dimensions, simplifying the task of installing RDUK in gas distribution points, cabinet and other gas distribution installations;
- The possibility of reconfiguring the regulator without dismantling it and stopping the gas supply to consumers;
- The climatic version of the device allows its operation in the ambient temperature range from -45° С to +40° С.
The device and principle of operation of the RDUK regulator
Device RDUK2 has the following features. The pressure regulator is formed by two nodes - a regulating node (actuator) and a control node (command control, the so-called "pilot"). The type of pilot is selected based on the required outlet pressure that the regulator must provide. According to this principle, models with a pilot of low pressure KH2 (0.005–0.6 kgf/cm2) and high pressure pilot KV2 (0.6–6 kgf/cm2) are distinguished.
The operation of the device is carried out due to the energy of the working environment and is carried out as follows. The reduction of gas pressure in the RDUK regulator occurs as a result of the movement of the equipped rubber seal poppet plug in relation to the valve seat. This movement is carried out under the influence of the difference between the inlet pressure on the plate and the outlet pressure acting from below.
The high-pressure gas that has passed through the filter is supplied to the small valve of the pilot assembly and after it to the submembrane space of the control valve. Excess gas from under the membrane of the control valve is discharged back into the gas pipeline by means of a relief throttle.
The membranes of the pilot and the actuator are pulsed with output pressure, which is always lower than the input. Depending on the gas flow rate and the inlet pressure value, the pressure under the diaphragm is constantly monitored and adjusted automatically by means of a small pilot valve. When the pressure at the outlet of the RDUK changes relative to the set value in the submembrane space, the pressure will also change, which will lead to the movement of the main valve to a new equilibrium position and the return of the outlet pressure to the required level.
How to buy a gas pressure regulator RDUK
Before you buy a pressure regulator RDUK2, it is worth choosing the optimal modification of the device based on the parameters of the outlet pressure, the diameter of the saddle and conditional pass(Du). For example, the RDUK regulator with DN 50 version has a seat 35 mm, DN 100 - 50 and 70 mm (low and high pressure respectively), DN 200 - a saddle of 105 and 140 mm (low and high pressure, respectively). How larger size saddles, the more throughput different modifications of the Kazantsev gas pressure regulator.
To clarify the availability of the modification of the RDUK regulator you are interested in, its current cost or other information of interest about the products presented on our website, you can contact the managers of the PKF SpetsKomplektPribor company. An application for the supply of the number of regulators you need can be left in any convenient way - by phone, Skype or e-mail.
| Name | Meaning |
| Working environment | non-aggressive gases (natural gas, compressed air) |
| Ambient temperature, °C | -40 to +60 |
| Working environment temperature, °C | -30 to +60 |
| Inlet pressure range, MPa | 0,03–1,2 |
| Outlet pressure regulation limits, MPa | |
| RDG-P50N | 0,0015–0,04 |
| RDG-P50V | 0,04–0,6 |
| Throughput, m3/h | |
| at Pvx = 0.1 MPa | 1150 |
| at Рin = 1.2 MPa | 7700 |
| Excess outlet pressure at zero consumption (dead end), %, no more |
10 |
| Proportional band, % of Р out | 5 |
| Valve seat diameter, mm | 38 |
| Accession | flange according to GOST 12817-80 |
| Conditional passage Du | 50 |
| Service life, years | 20 |
Throughput of regulators
| R in, MPa | RDG-P50N | RDG-P50V | |||||||
| P out, MPa | |||||||||
| 0,0015 | 0,005 | 0,01 | 0,04 | 0,04 | 0,06 | 0,10 | 0,30 | 0,60 | |
| 0,03 | 650 | 650 | |||||||
| 0,05 | 850 | 850 | |||||||
| 0,1 | 1150 | 1150 | 1150 | 1150 | 1150 | 950 | |||
| 0,2 | 1750 | 1750 | 1750 | 1750 | 1750 | 1750 | 1700 | ||
| 0,3 | 2350 | 2350 | 2350 | 2350 | 2350 | 2350 | 2350 | ||
| 0,4 | 2950 | 2950 | 2950 | 2950 | 2950 | 2950 | 2950 | 2400 | |
| 0,5 | 3500 | 3500 | 3500 | 3500 | 3500 | 3500 | 3500 | 00 | |
| 0,6 | 4100 | 4100 | 4100 | 4100 | 4100 | 4100 | 4100 | 4100 | |
| 0,9 | 5900 | 5900 | 5900 | 5900 | 5900 | 5900 | 5900 | 5900 | 5500 |
| 1,2 | 7700 | 7700 | 7700 | 7700 | 7700 | 7700 | 7700 | 7700 | 7700 |
Device and principle of operation
The regulator consists of two functional blocks, an actuator and a control regulator (hereinafter referred to as the pilot).
The pilot consists of four functional blocks: a filter, a stabilizer, a booster and the pilot itself, mounted on one body.
The filter is mounted on the pilot body and provides fine cleaning of the working environment through the filter pad 14. Designed to provide long-term uninterrupted operation pilot. The stabilizer is mounted on the body and provides a reduction in the inlet pressure coming through the inlet pipeline to the value necessary for the stable operation of the pilot and servo.
The stabilizer consists of a valve 15 with a seat, a membrane assembly 16 and a spring 17.
The forcing device is mounted on the housing and serves to increase the speed of the regulator's actuator. It consists of a spacer 19, a membrane assembly 20, a spring 21, a valve 22 and a throttle 23.
The pilot is directly mounted on the body and serves to control the main actuator of the regulator. The control is carried out by creating a control pressure by the pilot, which enters through the connecting pipeline into the control cavity of the actuator P2. The pilot consists of a valve 10, a membrane assembly 11, an adjusting spring 12, a plate 13 and an adjusting screw 18.
The design of the regulator provides fittings Sh1 and Sh2, through which the signal about the outlet pressure enters the actuating mechanism and pilot.
Products RDG-P50N, RDG-P50V differ in the design of the membrane unit of the pilot 11 and a set of tuning springs.
The principle of operation of the regulator
The inlet pressure, having passed through the inlet flange 1, gate 6, is throttled between the sealing edge of the gate and valve 9, enters the outlet flange 8 and further through the pipeline. The gap between the plug and the valve is adjusted automatically by the pilot.
The principle of the pilot.
Gas with inlet pressure passes through the impulse pipeline through filter 14, is throttled to the required value, passing through the gap between valve 15 and the stabilizer seat. The gap between the valve and the stabilizer seat is provided automatically. After passing through the valve 15, the pressure enters the submembrane cavity of the stabilizer and acts on the membrane assembly 16, on the other hand, the output pressure of the main servo drive and the spring 17 act on the membrane assembly. As a result of this interaction, a force arises that is transmitted through the stem to the stabilizer valve, and that in turn moves either in the direction of increasing the gap, or in the direction of its reduction. This ensures that the inlet pressure is reduced in the first stage.
1 - inlet flange; 2 - bushings; 3 - bellows assembly; 4 - return spring; 5 - membrane regulator assembly; 6 - shutter; 7 - limiting ring; 8 - outlet flange; 9 - valve; 10 - pilot valve; 11 - membrane pilot assembly; 12 - adjusting spring; 13 - adjusting plate; 14 - filter pad; 15 - stabilizer valve; 17 - stabilizer spring; 18 - adjusting screw; 19 - spacer; 20 - membrane forcing device assembly; 21 - spring forcing device; 21 - spring forcing device; 22 - valve; 23 - throttle.
