Cranes for underground installation 63. Ball valves made of polyethylene. Technical data of underground ball valve

Today, in the infrastructure of each settlement - small in population, medium or, conversely, large, there is a huge number of pipelines for various purposes. The use of polymer pipes for the installation of water supply and gas networks greatly simplifies the maintenance of the entire system and its individual sections, and also increases their service life. To regulate the medium flow and control the efficiency of the system on underground polymer networks, fittings made of appropriate materials are used - PE ball valves.

The convenience of using this type of reinforcement lies in the fact that its installation is carried out in a well-free way. For installation ball valve it is not necessary to equip a well on the network; after mounting on the network, it is enough to cover the crane with soil, bringing the control mechanism to the surface. These products are currently produced by many companies, both domestic and foreign, and their use is justified. The use of polyethylene ball valves allows you to quickly solve various technical problems, providing a reliable blocking of the flow of the medium flowing through the pipeline.

Underground pipelines are laid at various depths, however, in the Russian climate, many networks require a sufficiently deep occurrence of pipes - below the freezing point. In connection with the peculiarities of the installation of networks, the question of ease of access to the fittings installed on the network arises. Each polyethylene (HDPE) ball valve must be controlled at all times, regardless of its installation depth.

To do this, various types of control devices are used, in particular, rods and spindles of fixed and telescopic length, which are brought to the surface and serve to control pipeline equipment and its preventive maintenance.

In addition to facilitating device management underground laying, spindles and rods extend their service life, as they take on part of the driving load on the opening-closing mechanism. For the safety of the device and control mechanisms, it is customary to place a ball valve under the carpet. Installation of cranes under carpets is used in cases where the valve locations are located under the roadway or in other dangerous conditions. Manholes are also used as a protective means for underground installation fittings. Unlike carpets, hatches are flush with the surface of the ground or pavement.

The use of a polyethylene crane in an underground version has a number of advantages in comparison with other types of fittings. First of all, the ball valve PE (HDPE) is compact and easy to operate. Its installation on the network is carried out by butt or electrofusion welding.

To speed up and facilitate the installation of cranes on the network, cranes are produced with built-in metal embedded heaters. During the welding process, they melt the polyethylene and connect the fittings to the pipes. Many manufacturers also equip their products with welding indicators - special marks that simplify the work of welding operators.

Today, HDPE ball valves for polymer networks can have a different design. Products made entirely of polyethylene are in great demand. They are distinguished by strength, durability, complete resistance to corrosion, and the material of manufacture allows them to maintain elasticity, which makes them resistant to mechanical stress.

A polyethylene shut-off valve with a ball valve has several basic elements in its design - a body and, in fact, a ball valve. The spherical valve has a hole of a certain diameter through which the transported medium passes freely in the open position of the device.

Shut-off ball valves can be full-bore and non-full-bore. The first option is more common: for such valves, the diameter of the conditional passage coincides with the diameter of the internal passage of the pipe. Full bore polyethylene ball valves are more efficient because they do not reduce network throughput.

In order to close the valve, it is necessary to rotate the control mechanism - the handle, spindle, stem, lever by 90 degrees. The shutter rotates and blocks the medium flow. To ensure that the structure is completely sealed when closed, the ball valve and the control mechanism have seals in the form of plugs, gaskets and rings. In addition, in its design, the PE crane can use pressure disc springs for additional fixation of the shutter.

The use of ball valves on polymer networks is beneficial and convenient. Most products are made of low-pressure polyethylene grades PE 100 and PE 80. This is a durable material that is well connected to polymer pipes during welding. In addition, a polyethylene underground crane compares favorably with metal gates and gate valves - it is easier to manage, and its weight is much less.

Light weight is a lot of advantages: ease of transportation, ease of installation, insignificant loads on the pipeline.

Installing the device on the network plastic pipes small diameters does not require the use of additional supports and fixation, unlike cranes with metal elements in the design.

Polyethylene is resistant to electrochemical corrosion, which is especially important for fittings on gas pipeline networks. The material resists corrosion well, resists aggressive soils. The polyethylene ball valve installed on the water supply network retains its performance characteristics During a long time.

The average service life of the device is from 15 to 25 years, while all maintenance consists of a single annual opening and closing of the shutter.

The internal parts of the device are not subject to the formation of lime deposits and sediments. Polyethylene shut-off valves can be used in drinking water supply networks, as they comply with accepted hygienic and sanitary standards and parameters. The use of polyethylene ball valves on most gas and water supply networks allows you to save money on laying and equipping the network, while maintaining its efficiency and safety of operation.

Germes LLC is the exclusive representative of the Daeyoun [Deyon] plant and supplies to Russia polyethylene ball valves SDR11 of this manufacturer, as well as telescopic extensions for them.

General characteristics polyethylene ball valves:

• The DEEN ball valve (Daeyoun) is designed to control the flow of the medium (open / close) through the pipeline by turning the shut-off body by 90 degrees.
• Temperature range From -29 to 600C
• All plastic construction for maximum corrosion resistance. The ovality of the ball does not exceed 30㎛.
• The valve is completely made by welding from HDPE without the use of any adapters for other materials or flange connections.
• The presence of a support bearing in the center of the bottom, which ensures smooth sliding of the ball inside the crane (there is no displacement of the ball).
• The presence of a special non-freezing lubricant on the ball.
• The presence of three sealing rings installed between the bearing and the housing, which increase the level of tightness.
• The presence of a sealing ring installed between the adapter and the body prevents soil and dust from entering the inside of the valve.
• The presence of a pin between the adapter and the bearing securely fixes the valve ball during its opening and closing.
• 1/4 turn opening/closing. If the valves are equipped with a mechanical gearbox 2 ½ turns.
• The length of the pipe is designed for two weldings.
• The crane does not require Maintenance and controlled by a rod.
• The adapter is made of injection molded polypropylene. At the bottom of the adapter there is a locking device that prevents rotation more than 90°. An o-ring is inserted inside the adapter, which prevents foreign particles from entering.
• Corrosion protection measures are not required.
• There is no need to install any containment chamber or well around the tap, it can be buried with the same material as the rest of the pipeline.
• The production is certified according to ISO 9001 and JIS Q 9001.
• Wide range of product sizes (from 20 mm to 400 mm).
• Warranty period 2 years.
• Warranty period of storage (provided that the tightness of the original packaging is maintained) is 10 years.
• Operated with a telescopic rod.

Technical characteristics of polyethylene ball valves:

	Type and application	Underground installation (for gas 10 bar/water 16 bar)
	Material	PE80/PE100, PE2406/PE3408
	Opening / closing	¼ turn
	Temperature	From -29 to 600С
	Pass type	full bore
	Auxiliary stem type	Telescopic extension
	Purge type	No purges, 1 purge, 2 purges
	Body and socket welding	Electric welding or coupling
	Test standards	EN 1555, ANSI/ASTM B16. 40

Construction of polyethylene ball valves:

Dimensional and mass characteristics of polyethylene ball valves:

Standard PE Ball Valves	ISO diameter (mm)
	315 (Full bore)

PE ball valves without purge (ISO)	ISO diameter (mm)	Note
		With mechanical gear
	315 (Full bore)

PE Single Purge Ball Valves (ISO)	ISO diameter (mm)	Note
		Without mechanical gear
		With mechanical gear
	315 (Full bore)

Type Standard (NPC)
		Full bore polyethylene ball valves for gas made of PE 100 (PE 100) with a nominal section: 25/32-200/225 mm. PN 10, SDR 11	DN, mm	The weight, kg/pcs	Construction length, mm

All-welded ball valves with elongated stem- shut-off valves designed for underground pipelines. Underground ball valves are manufactured with a nominal diameter (DN) from 15 to 500 with a stem outlet under the carpet and the possibility of extending the stem from 1,000 to 4,500 mm, designed for working pressure (PN) 16 and 25.

The underground method of laying main pipelines is today considered one of the most appropriate. However, it requires the use of a special type stop valves, and the most suitable for this purpose are underground ball valves with extended stem.

These products have small dimensions and weight, body design underground ball valves eliminates any contact of the internal parts of the cranes with the soil. Most often used for underground installation all-welded ball valves, allowing to minimize the leakage of the working medium through the valve body. The main type of connection to the pipeline underground valves with extended stem- for welding, which provides maximum tightness and durability of the connection.

In order to protect the valves from mechanical damage and soil impact, an additional protective coating of the body of ball valves is carried out. Coverage happens various kinds- FRUSIS, BIURS.

For the purpose of management underground ball valves their design includes stem extensions that connect the ball to the control located above the ground.

The height of the stem extension can be any according to the requirements of the customers. Extensions come in standard lengths from 1000 to 4500 mm, as well as adjustable height, the so-called telescopic rods.

For driving underground cranes pneumatic or pneumohydraulic actuators are used. Drives are controlled by the transported medium.

The design feature of ball valves is the use of ball bearings (ball in trunnions). This design allows you to reduce the moment when opening a ball valve made of polyethylene at large pressure drops in gas distribution and water supply systems. When using a stem extension, it is possible to install the ball valve into the ground without a well, and for a wellless installation, a carpet and a base plate under the carpet are used to provide access to the valve control on the surface.

Ball valves are not inferior in performance and quality to metal ball valves, and in some characteristics even surpass them. Polyethylene ball valves manufactured by Polyvalve - Andronaco, Polytec, Frialen, Georg Fischer (+GF+), Daeyoun, FOX.

PE ball valves are different high quality, excellent performance and performance.You can buy HDPE ball valves by contacting our company, polyethylene ball valves are always available in our warehouse. We offer to buy ball valves from different (European and Korean) manufacturers at low prices.

Table of materials Ball valve PE100 SDR11
№	Component	Material
1	Frame	PE - polyethylene
2	Branch pipes	PE-polyethylene
3	Ball	PP - polypropylene
4	ball seal	NBR - rubber
5	Retaining ring	PP - polypropylene
6	Bearing	Acetal
7	Adapter	PP - polypropylene
8	stem seal	NBR - rubber
9	Adapter seal	NBR - rubber

Ball valves PND

General information for gas and water
Information	For Gas	For Water
materials	PE100	PE100
Maximum working pressure	10 bar (1 MPa)	16 bar (1.6 MPa)
Pace. range	-29 to + 60 C	-29 to + 60C
Method connections	welded welded with sleeve	welded welded with sleeve
Pass type
stem type	short elongated	Short elongated
Standard Ratio dimensions	SDR11	SDR11

Competitive advantages of PE ball valves.

• Passed certification "GAZCERT"
• HDPE ball valves comply with international standards
• Underground wellless installation in the ground of PE ball valves
• Open/Close 1/4 turn
• Polyethylene taps not subject to corrosion
• There are modifications of PE taps with purge
• Coupling and electrofusion (reducing) connection
• Safety of HDPE materials
• Do not require repair for the entire life of the HDPE pipeline
• Warranty period 2 years

  Ball valves made of PE100 SDR11 polyethylene, the best offer on the market for ball valves for gas distribution and water supply systems. We ship HDPE ball valves and extension stems to them in all regions of Russia and the CIS countries.

PE ball valves have all necessary documents

Name	Diameter	*Price RUB
	25mm	from 3 499.00 rub.
	32mm	from 3 499.00 rub.
	40mm	from 4 999.00 rub.
	50mm	from 6 199.00 rub.
	63mm	from 7 499.00 rub.
	90mm	from 12 990.00 rub.
Polyethylene ball valve d110	110mm	from 12 990.00 rub.
Polyethylene ball valve d125	125mm	from 16 990.00 rub.
Polyethylene ball valve d160	160mm	from 33 999.00 rub.
Polyethylene ball valve d180	180mm	from 39 999.00 rub.
Polyethylene ball valve d200	200mm	from 54 999.00 rub.
	225mm	from 89 990.00 rub.
Polyethylene ball valve d225mechanical gearbox	225mm	from RUB 99,990.00
Polyethylene ball valve d250mechanical gearbox	250mm	from 199 990,00 rub.
Polyethylene ball valve d280 mechanical gearbox	280mm	from 229 990.00 rub.
Polyethylene ball valve d315 full bore mechanical gearbox	315mm	from 339,990.00 rub.
Polyethylene ball valve d355mechanical gearbox	355mm	from 399,990.00 rub.
Polyethylene ball valve d400mechanical gearbox	400mm	from 499 990.00 rub.
Polyethylene ball valve d630mechanical gearbox	630mm	on request
Drive rod (telescopic rod)	L=1.2-2 m.	from 2 999.00 rub
T-key	L=1.2 m.	1 500.00 rub

Prices for HDPE ball valves

* The price for PE ball valves is indicated including VAT at the exchange rate of the Central Bank on 04/01/2017. on special terms of purchase. In accordance with the commercial policy of the company, the sale price may vary. The exact calculation of prices for HDPE ball valves is made on the basis of the client's application and is reflected in the invoice for payment. It is not a public offer.

*** Conditions of free delivery of HDPE valves: delivery is carried out to the nearest terminal of the transport company to the customer, with 100% prepayment of the cost of ordering HDPE ball valves in the amount of more than 100,000 (one hundred thousand) rubles. MOVE reserves the right to choose a transport company. Terms and order of delivery are negotiated separately. The conditions of free delivery apply to transportation up to 3000 km, when transporting more than 3000 km. MOVE reserves the right to partially compensate the customer for the cost of transportation.

For cooperation and additional discounts, please contact the company.

You can buy PE ball valves in our company on the most favorable terms, every client is important to us!

Components of PND ball valves.

stocks

Ball Valves

Underground ball valve found wide application in the field of installation of pipeline communications. It is used as a shut-off valve to shut off and regulate the flow of the working medium. Despite the simplicity of the design, it demonstrates a high level of reliability in operation; during its operation, the presence of "stagnant" zones is excluded.

Underground cranes presented on our website have a different purpose

• Equipping systems that transport aggressive and non-aggressive media;
• Controlled by means of a gearbox, but it is possible to equip it with a pneumatic or electric drive;
• Operation under nominal pressure up to 16 MPa;
• Installation of communications in a wide range of diameters: 80-600 mm;
• Use on pipelines that are laid underground.

Design features

main working body underground ball valves serves as a shutter, which is a steel ball with a through hole. When the locking element is open, the hole and the pipeline are parallel to the same axis. When blocking the movement, the hole moves by 90 ° and is located perpendicular to the pipe.

Alloy and stainless steel with high anti-corrosion properties are used for the manufacture of fittings components. Elastic PTFE is selected for sealing.

From design features underground cranes It is worth highlighting the presence of an elongated stem. Welding technology is used to connect fittings to the pipeline, which provides the following advantages:

• Tightness of communication;
• Reliability of the pipeline in operation
• Maintenance free.

When using this armature, it is not necessary to create manhole and enclosing structure. If it becomes necessary to dismantle tap, then this is done by cutting off part of the nozzles. During installation and dismantling works the valve must be left in the open position. Otherwise, the ball may be damaged. The fittings are selected depending on the operating conditions and specifications pipeline system.

In the company "StroyNefteGaz" you can purchase underground ball valves for various pipelines. All presented models are of high quality workmanship and long term operation.

For underground pipelines buried in relation to the ground surface, an underground ball valve was created driven by an electric motor, pneumatic cylinders, a gearbox or a T-shaped key. The body has a multi-layer anti-corrosion coating, the spindle extension is protected by a vertical shell pipe with a flanged connection to the upper part of the valve body.

Design features

Initially, the ball valve has more than 100 versions, each of which has its own marking in table No. 1 ST TsKBA 036 of 2007. For example, single-pipe 10nzh937p, coupling economy 10nzh12p, retro 10nzh11p, three-way 10nzh2p, for welding 10s7p, in an all-metal monocase 10nzh13p, fitting 10nzh14p, reducing 10nzh24p, with leakage control 10s28p, with heating 10p.

Almost every one of them is suitable for underground installation, but only after making special changes to the design. For example, it is possible to install inside the well and with simple backfilling with soil. In the latter case, it is imperative to protect the extension cord with a tubular sheath along its entire length. The pipe is attached to the body with a flange, so a counter flange is required in the upper part.

Ball valve body

The design of the ball valve body depends on several objective factors:

• preparation method;
• development of design bureaus of a specific manufacturer's plant;
• requirements of GOST, TU, OST and ST standards.

According to the manufacturing technology, ball valves are divided into categories:

• in an all-metal non-separable case;
• in two parts;
• from three elements.

In the first case, the body is turned on the machine, cast into the formwork by the centrifugal method, welded from several tubular blanks or two stamped parts.

In the second version, the body of the ball valve is assembled on flanges from two vertical halves. In the latter case, the seat with the ball is pulled together into a single package by side pipes through the flanges using studs.

In addition, the body of the underground ball valve can be full bore or reducing. In the first case, the inner diameter coincides with the size of the pipeline section, the hydraulic resistance inside the line is minimal. In the second version, the couples are narrowed by one standard size, that is, they can reduce the characteristics of the flow of the working medium, diagnosing and cleaning devices will not be able to pass through such a valve.

A collapsible body of 2 or 3 parts is much more convenient in terms of maintenance of valves. At any stage of operation and during scheduled maintenance, you can clean the internal cavity or replace the seat rings. A non-separable case is much more hermetic and cheaper to manufacture.

Some manufacturers use original technical solutions in the design of the body of ball valves. For example, drainage system in the body of fittings of large diameters allows you to drain condensate from the pipeline transporting natural gas.

When using a hydraulic and pneumatic drive, they can be controlled from external sources and the transported medium itself. For this, special holes are made in the housing, and the drive is strapped.

The bypass system allows you to safely equalize the pressure inside the valve cavity and behind the nozzles, which is especially important for ball valves DN 700 - 1400 mm.

The body material is carbon, alloy and stainless steel marked "s", "ls" and "nzh", respectively. Depending on the method of installing a ball valve underground, different body protection against aggressive media is used:

• acrylic paint - has electrical insulating properties, protects the reinforcement from stray and induced currents;
• epoxy-based coal paint - resistant to electrocorrosion and mechanical damage;
• polyurethane foam coating - used for wellless installation directly into the ground;
• polymer paint coating - standard protection against corrosion and mechanical damage.

Large-sized ball valves of underground installation are mounted by cranes and manipulators. Cloth and cable slings are used for engagement, but additional cargo hooks are usually not installed on the body.

Locking knot

Initially, the underground ball valve belongs to the category of swivel valves. There are shut-off, shut-off, regulating, shut-off-reducing and regulating-cut-off modifications for specific operating conditions. The main features of ball valves are:

• movement of a spherical plug from one extreme position ("open") to another ("closed") during the rotation of the spindle by 90 degrees, therefore the valve is called half-turn;
• the cork is mounted in supports, a wear-resistant anti-corrosion coating is applied to its surface;
• the seats have a design of rings that evenly distribute the pressure of the working medium on the ball;
• manufacturers provide lubrication to the spindle and seat assemblies.

The basic package of large diameter ball valves usually includes a combined actuator with the ability to operate on gas or liquid media. This is the most economical option to reduce the budget for the operation of the main pipeline.

The design of the plug in the supports makes it possible to spring the seats to the spherical plug or use the pressure of the working medium itself for the same purpose. That provides the maximum A class of tightness of the gate assembly on both sides of the valve. For the safety of the rings themselves, in turn, secondary soft seals and special grooves are responsible, into which the rings go.

Pressure relief from the internal cavity of the valve body is possible only when transporting liquid media. For gas pipelines, valves are produced with a hermetic design of the internal cavity without drainage and bypass.

Climatic modification according to GOST 15150 - "UHL", "HL", "U" or "T" is chosen by the customer.

Spindle and extension

Underground ball valve manufacturers typically provide the following spindle extensions:

• less than 1000 mm;
• 1001 - 1500 mm;
• 1501 - 2000 mm;
• 2001 - 2500 mm;
• 2501 - 3000 mm.

In this case, the lower part of the tubular shell of the spindle extension is fixed with bolts with a mating flange on the body of the ball valve. The upper end of the extension is fitted with a T-wrench (usually in fire hydrants and HKX systems), pneumatic or hydraulic actuator, bevel, spur and worm gearbox, electric actuator or manual handwheel / handle.

If the hydraulic pneumatic actuator is controlled by the working medium from the main pipeline, copper or steel tubes are additionally used, tying the valve body with the nozzles of the drive device. The tubular sheath of the spindle extension is covered with the same protective compounds that protect the body of the ball valve - paint and varnish or polymeric materials.

Drive device

For an underground ball valve, operation is allowed with all types of drives indicated in the table of figures GOST R 5272 of 2007:

• 0 – remote control;
• 3 - 5 - mechanical gearbox with worm, cylindrical and bevel gears, respectively;
• 6 – pneumatic actuator;
• 7 - hydraulic drive;
• 8 – electromagnetic solenoid;
• 9 - electric drive.

In addition, at the request of the customer, drives of a combined type can be installed - electro-hydraulic, pneumo-hydraulic. For diameters from 400 mm, AAZK automatic machines are often used, which close the valve without the participation of an operator. Piston drives with liquid and gas working media require BUK, BUP and EPUU control units powered by 24 V, 110 V or 220 V DC.

For use at gas facilities / mains of Moscow, a ball valve for underground installation must have a GazCert certificate. In heating systems, hot water and cold water, such documentation is not needed.

In addition to ball valves with all types of actuators for any installation method, our resource offers pipeline parts, shut-off, control, shut-off, emergency valves from leading brands of the Russian Federation and our own production. Consultations for site visitors are absolutely free.