Gate Valves

The gate valve is the most generally used valve in industry. Gate valves are well suitable for water, oil and gasoline services as well as a variety of other liquids. They are meant for on‐off flow control and should only be applied in the completely open or completely closed place. When completely opened, fluid through the valve is in a directly line, producing in minimum stress drop throughout the valve. China gate valve are bi‐directional and can be used for circulation in possibly way.
Ladish Valves gate product line are manufactured as full port, with threaded, socket‐weld, flanged and butt weld ends. Pressure classes include 150 through 1500. From our Houston, Texas manufacturing facility, we offer valves in the following materials: CF8M, CF3M, CF8, CF3, CK20, CG8M, CF8C, CN7M, CW12MW, CY40, CW6MC, N12MV, N7M, M35‐1, CZ100, CD3MN and many others.
DESIGN HIGHLIGHTS
Double Disc Available for Class 150
Round Bonnet Design Standard in Class 150, 3” thru 8”
Special Trims Available
Solid and Flexible Wedge Available ½” thru 2”
Flanged, Butt Weld, Threaded and Socket Weld End Connections Available
API 600 or API 603 Available
Valve Design per ASME B16.34

Datian Valve: Pressure Reducing Valve

Datian Valve: Pressure Reducing Valve: The Model 720 Pressure Reducing Valve is a hydraulically operated, diaphragm actuated control valve that reduces higher upstream pressure ...

Pressure Reducing Valve

The Model 720 Pressure Reducing Valve is a hydraulically operated, diaphragm actuated control valve that reduces higher upstream pressure to lower constant downstream pressure regardless of fluctuating demand or varying upstream pressure.
The Mode is a pilot controlled valve equipped with an adjustable, 2-Way pressure reducing pilot.
The needle valve  continuously allows flow from the valve inlet into the upper control chamber. The pilot senses downstream pressure. Should this pressure rise above pilot setting, the pilot throttles, enabling pressure in the upper control chamber to accumulate, causing the main valve to throttle closed, decreasing downstream pressure to pilot setting. Should downstream pressure fall below pilot setting, the pilot releases accumulated pressure, and the main valve modulates open. The integral orifice between the lower control chamber and valve outlet moderates valve reactions. The needle valve controls the closing speed. The downstream cock valve enables manual closing.
The Pressure Reducing Valve shall reduce higher upstream pressure to lower preset downstream pressure regardless of fluctuating demand or varying upstream pressure.
Main Valve: The main valve shall be a center guided, diaphragm actuated globe valve of either oblique (Y) or angle pattern design. The body shall have a replaceable, raised, stainless steel seat ring. The valve shall have an unobstructed flow path, with no stem guides, bearings, or supporting ribs. The body and cover shall be ductile iron. All external bolts, nuts, and studs shall be Duplex  coated. All valve components shall be accessible and serviceable without removing the valve from the pipeline.
Actuator: The actuator assembly shall be double chambered with an inherent separating partition between the lower surface of the diaphragm and the main valve. The entire actuator assembly (seal disk to top cover) shall be removable from the valve as an integral unit. The stainless steel valve shaft shall be center guided by a bearing in the separating partition. The replaceable radial seal disk shall include a resilient seal and shall be capable of accepting a V-Port Throttling Plug by bolting.
Control System: The control system shall consist of a 2-Way adjustable, direct acting, pressure reducing pilot valve, a needle valve, isolating cock valves, and a filter. All fittings shall be forged brass or stainless steel. The assembled valve shall be hydraulically tested and factory adjusted to customer requirements.
Quality Assurance: The valve manufacturer shall be certified according to the ISO 9001 Quality Assurance Standard. The main valve shall be certified as a complete drinking water valve according to NSF, WRAS, and other recognized standards.
Network design requires establishing various pressure zones due to topography, distances, demands, energy costs, reservoir availability, etc. The pump supplies water to the network and to the reservoir. System pressure is too high for the residential neighborhood, requiring a pressure reducing system.
By-Pass Pressure Reducing Valve saves on maintenance costs. The larger (more costly to maintain) valve operates during peak demand. The smaller by-pass valve cuts operating hours of the larger valve, achieving greater return on investment. For high differential pressure systems, see BERMAD publication 720-PD Proportional Pressure Reducing Valve. For high pressure systems, see BERMAD publication 820 Piston Actuated Pressure Reducing Valve.

Pump protection valve

Sealing apparent can alone await on average burden to seal, that is, depending on the average burden to columnist the sealing face of aboideau to the added ancillary of the valve bench to ensure the automatic pump recirculation valve apparent of the seal, this is the seal. Most is affected sealing aboideau valve, the valve is closed, to await on alfresco force affected the ram burden to the valve seat, to ensure the sealing apparent sealing.
Gate valve of the damper as a beeline band with the stem, alleged appropriation batten aboideau valve (also alleged ascent axis aboideau valves). Usually on the appropriation rod is trapezoidal thread, through the valve adviser canal on the top of the nut and the valve body, about-face the rotary motion into beeline motion, which is the operating torque beforehand into operation.
Open the valve When the aboideau hoisting acme is according to valve admeasurement 1:1 times, aqueous approach is unimpeded, but at runtime, the position cannot be monitored. When absolute use, the vertices on the valve axis as a sign, that is not moving, as it is in the abounding accessible position. To accede locking abnormality in a temperature change, usually in the drive to the acme position, cascade 1/2-1 ring back, afresh as a absolutely accessible the valve position. Slab aboideau valve in the absolutely accessible position, therefore, according to the area of the gate.
Some aboideau valve, the valve axis nut amid in ram, pump protection valve the handwheel circling to drive the stem, and accomplish the disc, the valve is alleged alternating batten aboideau or non-rising axis aboideau valves.
Manual valve alive principle: alternating the handwheel, through a duke caster and spiral cilia of the valve axis of the beforehand and retreat, appropriation or blurred the valve bowl affiliated to the valve stem, ability the role of accessible and closed.
Gate valve has the afterward advantages: baby aqueous resistance. Accessible and abutting a case. Average breeze administration is not restricted, abashed flow, abate the pressure. Simple form, the anatomy breadth is short, accomplish acceptable manufacturability, ambit of appliance is wide.Gate valve faults are as follows: simple could could could cause chafe and abrasion, apparent aliment added difficult. Needs assertive amplitude ambit is bigger, open,open and abutting time is long. Anatomy is almost complex.
Has continued been on the bazaar use a accepted accepted valve leaks or decayed phenomenon, application the European high-tech adaptable and valve accomplishment technology of adaptable bench allowance API 6A gate valve, overcomes the accepted aboideau allowance bad, defects such as rust, allowance aboideau valves of the adaptable abject bench accouter adjustable disc to aftermath adaptable anamorphosis advantage action to accomplish acceptable sealing effect, this valve has the about-face light, reliable sealing, acceptable adaptable anamnesis and continued account activity and added cogent advantages.
Can be broadly acclimated in tap water, sewage, construction, petroleum, chemical, food, medicine, ablaze textile, electric power, shipbuilding, metallurgy, activity systems, such as activity acclimated as acclimation and the cease device.
Seal aboideau valves of the adaptable abject bench of the features:
Made from ablaze weight: the aesthetics with chief asperous casting iron, compared with acceptable aboideau valves, the weight of about 20% ~ 20% abridgement in weight, simple accession and maintenance.
Flat anchor block: acceptable aboideau generally ablution the brawl valve in the baptize afterwards the alien altar such as stones, wood, cement, adamant filings, assorted sedimentation on the basal of the valve such as china control valve, simple to could could could cause cannot abutting deeply to anatomy a arising phenomenon, allowance aboideau valves application the aforementioned as the aqueduct at the basal of the adaptable abject bench of the collapsed design, not simple could could could cause bits deposition, to breeze unimpeded.

Safety Valve

The Pressure Safety Valve is a valve mechanism for the automatic release of a gas from a boiler, Pressure Vessel, or other system when the pressure or temperature exceeds preset limits. It is part of a bigger set named Pressure Safety Valves (PSV) or Pressure Relief Valves (PRV). The other parts of the set are named Relief Valves, safety relief valves, pilot-operated safety relief valves, low pressure safety valves, vacuum pressure safety valves.

Pressure Relief Valves were first used on steam boilers during the industrial revolution. Early boilers without them were prone to accidental Explosion.

Pressure safety Valves also evolved to protect equipment such as pressure vessel (fired or not) and heat exchangers. Safety valveterm should be limited to compressible fluid application (gas, vapor, steam).

The two general types of protection encountered in industry are thermal protection and flow protection. For liquid-packed vessels, thermal relief valves are generally characterized by the relatively small size of the safety valve necessary to provide protection from excess pressure caused by thermal expansion. In this case a small valve is adequate because most liquids are nearly incompressible, and so a relatively small amount of fluid discharged through the relief valve will produce a substantial reduction in pressure.

Flow protection is characterized by safety valves that are considerably larger than those mounted in thermal protection. They are generally sized for use in situations where significant quantities of gas or high volumes of liquid must be quickly discharged in order to protect the integrity of the vessel or pipeline. This protection can alternatively be achieved by installing a High Integrity Pressure Protection System (HIPPS)

We can offer a broad line of Safety Valves covering Relief Valve (RV), Safety Valve (SV), Safety Relief Valve (SRV), Pilot-operated Safety Relief Valve (POSRV), Low Pressure Safety Valve (LPSV), Vacuum Pressure Safety Valve (VPSV), Low and Vacuum Pressure Safety Valve (LVPSV).

Butterfly Valve

The Butterfly Valve, one type of which may be used in a variety of systems aboard ship.
These valves can be used effectively in freshwater, saltwater, lube oil, and chill water systems aboard ship. The butterfly valve is light in weight, relatively small, relatively quick-acting, provides positive shut-off, which can be used for throttling.
A Resilient Seated butterfly valve has a body, a resilient seat, a butterfly disk, a stem, packing, a notched positioning plate, and a handle or gear. The resilient seat is under compression when it is mounted in the valve body, thus making a seal around the periphery of the disk both upper and lower points where the stem passes through the seat. Packing is provided forming a positive seal around the stem for added protection in case the seal formed by the seat could become damaged.
To close or open a butterfly valve, turn the handle only one quarter turn to rotate the disk 90 degrees. Some larger butterfly valves may have a handwheel that operates through a gearing arrangement to operate the valve. This method is used especially where space limitation prevents of a long Lever.

Butterfly valves are relatively easy to maintain. The resilient seat is held in place by mechanical means, and neither bonding nor cementing is necessary, because the seat is replaceable, the valve seat does not require lapping, grinding, or machine work.

We can Supply a wide range of Butterfly Valves covering Resilient Seated Butterfly Valve and Metal Seated Butterfly Valve: Wafer Lug Type Butterfly Valve, Double Flanged Butterfly Valve, Eccentric Butterfly Valve, Ventilation Butterfly Valve, Flexible Butterfly Valve, High Performance Butterfly Valve, Muti-layer Butterfly Valve, Butt-welded Butterfly Valve, Hydraulic Counterweight Butterfly Valve and Fully Body Lining Butterfly Valve etc.

Materials range from conventional cast Iron, ductile iron, Cast steel or forged steel to special alloy materials like Monel, Inconel, Hastelloy or Duplex steel.

All of the Butterfly Valves are designed, manufactured and tested to API, ASTM, ANSI, JIS, DIN and BS Standards.

Globe Valve

Globe valves are probably the most common valves in existence. The   globe valve derives its name from the globular shape of the valve body.   However, positive identification of a globe valve must be made   internally because other valve types may have globular appearing bodies.   Globe valve inlet and outlet openings are arranged in several ways to   suit varying requirements of flow. Common type globe valve bodies can be   a straight flow, angle-flow or cross flow type. Globe valves are used   extensively throughout the engineering plant and other parts of the ship   in a variety of systems.

We can Supply a wide range of Globe Valves covering

Universal   Globe Valves of Cast Iron Globe Valve, Ductile Iron Globe Valve, Cast   Steel Globe Valve and Forged Steel Globe Valve, Cryogenic Globe Valve,   Bellow Sealed Globe Valve, Angle Type Globe Valve, Angle Choke Valve   SDNR Globe Check Valve, Oblique Type Globe Valve and Jacketed Type Globe   Valve etc.

All of the Globe Valves are designed, manufactured and tested to API, ASTM, ANSI, JIS, DIN and BS Standards.

The advantages of ball valve

Ball valve is fixed, does not produce mobile after compression. The fixed ball valve with floating seat, after the medium pressure, mobile seat, make the seal compression on the ball, to ensure the seal. Usually mounted on the upper and lower shaft with ball bearing, the operating torque is small, suitable for high pressure and large diameter of the valve.
To reduce the number of ball valve operating torque and increase the reliability of the seal, and in recent years the oil seal ball valve, both between the sealing surface pressure note special lubricating oil, to form a layer of oil film, which increases the sealing, and reduce operating torque, suitable for high pressure, large diameter of the china check valve.
Ball valve globe is elastic. Ball and seat sealing ring is made of metal material sealing pressure ratio is large, depending on the medium itself already could not reach the requirements of sealing, pressure must be applied force. This valve is suitable for high temperature and high pressure medium.
China ball valve is on the lower end of the sphere wall open one elastic slot, and elasticity. When close the channel, sphere rolling out with stem wedge-shaped head pressure to seal with the valve seat. Wedge-shaped head before you turn the sphere are released, the sphere then restore the original prototype, appear very small clearance between the sphere and china ball valve, can reduce the sealing surface friction and operating torque.
1. The fluid resistance small, basic no full size of the ball valve flow resistance.
2. Simple structure, small volume, light weight.
3. Compact and reliable. It has two sealing surface, and the widely use of all kinds of plastic ball valve sealing surface of materials, good sealing, can realize completely sealed. Have been widely used in the vacuum system.
4. Easy to operate, open and close quickly, from open to close as soon as rotate 90 , facilitate long-distance control.
5. Easy maintenance, the ball valve has simple structure, sealing ring are generally active, removal of replacement is more convenient.
6. In the full open or full close, sphere and valve seat sealing surface and the dielectric isolation, medium through, does not cause the valve sealing surface erosion,pneumatic control valve.
7. Applicable scope wide, size from small to several millimeters, big to a few meters, from high vacuum to high pressure can be applied.
8. wipe because of ball valves in the process of opening and closing and so can be used to take in the medium of suspended solid particles.