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Product Group :
Contact Person Ms. lucy
haidian, Beijing, Beijing
Applications
API6D
High-performance pipeline ball valve is Raymond(RMD)hightech
products,as switch control equipment,it is mainly used in natural
gas,oil,gas,liquefied natural gas pipeline transmission system and
other industries,its anti-sulfur products containing hydrogen
sulphide,impurities and high corrosion are suitable for the
long-distance natural gas pipeline.
Main features
Body of
high-performance pipeline ball valve is forged structure.The
connection type for body and vice-body can be BB(bolted
connection)and WB(welded connection).The WB(welded connection)and
the LWB(Fully-welded extended stem)structure isadopted for buried
ball valves,as shown below.
High performance pipeline ball valve series has the feature of
strength,high perfect sealing,maintenance-free,long life and so
on.The production of this series ball valve adopts the
international advanced ball valve design and manufacturing
technology,selects high-quality materials in accordance with the
standard selection of materials and combines with advanced
materials forming forging technology.At the same time,with the
years of ball valve design and manufacturing experience,the use of
advanced processing and manufacturing equipment and production and
processing technology,through the first-class inspection and
testing equipment and instruments,perfect quality assurance
management system and excellence in the production of
high-performance philosophy can ensure the quality of valves.This
series of valve has the performance of a high strength,defect-free
forging body,excellent sealing performance,even at maximum pressure
difference(full pressure),it will still be able to ensure that seal
without leakage,after frequent switching action to realize a safe
usage in the transportation of oil,natural gas,coal gas,and other
special medium transportation pipeline.
The special structure of valve seat seal
Floating structure
means seat reciprocally can move along channel direction,so as to
guarantee the ball and seat are tightly sealed.
(Ⅰ)Valve seat structure suitable for different occasions and
sealing requirements
Valve seat can be designed as a standard single-piston effect and
specific dual piston effect,Figure1 shows single-piston
effect-inletside seal;Figure2 shows Dual Piston effect-outlet-side
seal;Figure3 shows special dual piston effect sealing
structure
(Ⅱ)Multi-level structure of the valve seat seal
As shown in Figure4,there are two elastic O-ring in the valve seat
ring-ring A and ring B.Sealing ring A spring-loaded through the
valve seat so that the sealing surface of sealing ring A tightly
fit with ball surface to form an initial seal.When there is
pressure in the system medium,the piston force
produced by the piston force produced by the piston effect of size
difference makes elastic deformation of the ring A Ershi sealing
surface and ball more closely fit the surface to form a
re-sealing;meanwhile,due to ring A in the medium resulted in
elastic deformation under pressure so that the sealing ring B is
also closely fit the surface of ball for the formation of the
second stage seal.When the system medium pressure increasing,it
will have an enormous pressure in the valve seat ring A and ring
B,so that the two seals have a greater elastic deformation,and then
the metal valve seat ring surface and the ball surface sealing
together to form a third level of metal to metal seal.
(Ⅲ)The assisted valve seat sealing equipment
Based on the actual service condition,medium requirement,sealing
requirement,etc.,the assisted valve sealing equipment will be
considered to be necessary or not.The assisted valve sealing
equipment is a one-way valve installed outside of valve body that
can prevent medium leakage and can inject sealing grease into valve
body by external force.When the assisted valve seat sealing
equipment is required,valve seat ring shall be design and processed
with injection grove and hole to connect the assisted valve seat
sealing equipments.Such equipment can prevent the medium by the
sealing of injection of rease.Refer to Figure5 for
reference.
Multi-level structure of stem sealing
Figure6 shows the stem multi-level sealing by
adopting"O"ring,flexible graphite and grease injection;"O"ring
achieves the first level stem sealing;Replaceable flexible graphite
realizes the second level sealing by the compression of packing
sleeve and packing flange;And the third evel sealing is realized by
installing assisted sealing injection valve to the packing box,and
by designing with the injection groove and hole to connect with the
stem injection valve,which can inject grease.
Unique and safe seat structures
Ball valve
fireproof design is implementation of the API**7,API6FA
standards.According to service conditions and user
requirements,ball valve can be designed as a fireproof
structure.
(Ⅰ)Fireproof structure of seat
As shown in figure7,there is composite fireproof ring,which are
combined with graphite and stainless steel wire in the seat.Once
the soft ring is burnt out in case of a fire,the fireproof ring and
seat ring will form a piston structure through the spring to load
the valve body.That will push and closely contact the metal seal
surface of the seat ring to the body surface,So as to prevent a lot
of medium from leaking from the burnt place of the seat ring,and
prevent the fire from expending.
(Ⅱ)Fireproof structure(body and bonnet)
The seal gasket for bolt connecting valve body and valve bonnet,are
used fireproof stainless steel wire and flexible graphite
gaskets.Gasket compression load through the bolts and
ultimately,ensure the valve body and valve cover between the metal
to metal contact,so that the valve can with stand more high
load,but also improve the fire safety of the valve.But for the full
welded ball valve,the valve body and cover is welded structure,that
fundamentally eliminate the possibillity of leakage of the valve
housing.Even in the case of fire damage,there will be no
leak.
(Ⅲ)Fireproof structure(body/packing and stem)
The body and packing connection gasket adopts fireproof stainless
steel wire and flexible graphite gaskets.The stem packing adopts
flexible graphite to ensure no leakage in case of fire.
Anti-blow out and anti-static structure of stem
As figure8
shows,the stem head is designed to convex forms with a big and
small head structure.And it is hold tightly by the packing box so
that the stem will not blow out when the cavity pressure increasing
abnormally,during the valve operation,the friction of the ball and
seat will cause static,which will gather on the ball.In order to
prevent static sparks,we set a stem anti-static device to derive
the electric charge gathering on the ball.
Automatic pressure relief structure
When the cavity
pressure is increasing abnormally,the single-piston seat can
release the pressure by the pressure-relief device installed on
valve body;While the specific double-seat piston effect of the
valve seat have automatic pressure relief function through the
additional pressure relief devices installed on the valve
body.
Double block and bleeding structure
In order to meet
the customers' various requirement,the ball valve has two
series,full-bore structure and reduced-bore.For the full-bore
structure,the channel diameter is equal to the pipes,which is
conceit for pipe clearing.For the reduced-bore,compared with the
same size of full bore structure,it has smaller volume and lighter
weight,so it is widely used,and has bright
future.
Full-bore structure and reduced-bore structure
In order to meet
the customers' various requirement,the ball valve has two
series,full-aperture structure and reduced-aperture.For the
full-aperture structure,the runner diameter is equal to the
pipe's,so as to cleaning the pipe more easily.For the
reduced-aperture,compared with the same size of full-aperture
structure,it has smaller volume and lighter weight,so it is used
widely,and has bright future.
Valve driven
We can supply two
types of maual operated valves,one with hand level and the other on
with hand operation device.The size of hand level operation valve
is limited to
4"-Class**0;4"-Class**0;3"-Class**0;3"-Class**0;2"-Class***0;1"-Class***0。
We can also supply valves driven by electrical actuator,pneumatic
hydraulic and hydro-pneumatic actuator,The connection flange is
according to ISO***1
Extended stem design
We can extend the ball valve stem according to the customer specific requirement(underground ball valve).No specific restriction for the length of the exteded stem,but it must be specified before signing the order.
Main characteristics
LWB ball valve is a type of API6D fully welded ball valve with extended stem.It is mainly applied understand.Its valve body is buried understand while the operation device and accessories(assisted sealing device,exhaust/over pressure protection device,bleeding device)are above the groud by exteded stem,which enable the user to operate the valve easily.This type of valve can be driven by hand (worm gear),pneumatic,hydraulic,pneumatic-hydraulic linked and electrical actuator.Moreover,according to actual service condition and end user's special requirements,high performance,intelligent hydro-pneumatic and hydro-electrical ball valve can be designed as the switch device or energency device(with emergency shut down system).The intelligent hydro-electrical ball valve is a type of self-operation valve which can open or close by medium pressure in pipeline without extra assistance.
Extended stem size
The stem can be extended according to the customer's requirement.No specific restriction for the length of the extend stem,but it must be specified before signing the order.
Transit short pipe(sleeve pipe)
As long as
following the instruction of the operation and installation,our
fully-welded underground ball valve do not need the transit short
pipe(sleeve pipe).If the customer needs the sleeve pipe,we can
provide the following two choices:
A. forged steel sleeve pipe,welded on the basic material of the
bonnet side before finishing,installed with the ball valve,the
length can be up to **0mm.
B. as a part of the pipeline,the pressure grade and the
specification of the sleeve pipe is equal to the pipeline.It is
welded on the valve after the valve produced and inspected
according to the standard.No size restriction,unless the shipment
reasons.It is better than the customer provides the material if the
grade and size is not standardized.
Accessories
We can supply the accessories according to the customer requirement.For example discharge pipe,bleed port,assistant grease injecting pipe,and so on.
Country: | China |
Model No: | - |
FOB Price: | ( Negotiable ) Get Latest Price |
Place of Origin: | - |
Price for Minimum Order: | - |
Minimum Order Quantity: | 1 |
Packaging Detail: | - |
Delivery Time: | - |
Supplying Ability: | - |
Payment Type: | T/T, L/C |
Product Group : | ball valve |