羊鸡属相合不合TECHNICAL BULLETIN
Valtek FlowTop Control Valve
FCD VLENTB0060 – 11/09 (Replaces FCD-VLATB060)
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Body Asmbly
Figure 1: FlowTop Control Valve Body Asmbly
The FlowTop control valve is a high-performance, general rvice valve coupled with the high thrust FlowAct pneumatic diaphragm actuator.
The Logix 500 positioner is mounted standard on FlowTop control valves. The Logix 500 simplifies and reduces calibration time to 20 conds or less by pushing two buttons. The easily installed HART compatible positioner make the FlowTop/Logix 500 combination the best choice for general rvice valve applications. There is no need for additional software or software support and upgrades. Handheld devices are not needed to calibrate this valve, making it the highest performing, low cost solution for general rvice valves.
The Pop-belly shaped gallery give the FlowTop more C than all the other globe valves on the market.
Designed for u in ANSI Class 150 or 300 rvice applications, the FlowTop control valve is capable of operating within temperatures ranging from -500 to 8000 F (-460 to 4270 C).
药物外渗
The FlowTop control valve is available in sizes 0.5 to 4 inches with a carbon steel or stainless steel body. It features flow under, single ated trim with a post-guided valve stem to eliminate cage guiding problems.
Heavy duty parts constructed of corrosion resistant materials provide extended valve life.
Zero external leakage at the body to Graphite gasket eliminates leakage and minimizes torque requirements. Multiple equally spaced body bolts ensure optimal Stable plug travel over entire stroke of Solid, sturdy post style guide minimizes vibration and wear.
说课和讲课的区别
Very low at leakage: A solid graphite at gasket provides excellent shut-off. No lapping or grinding required to achieve class 4 shut-off. No more messy lapping values available per valve No need to lap the plug and at
systems available: UltraGuard packing, which requirements. up to 5 years; required (e Figure 18)
Highest globe valve C v ’s on the market: The pop belly shaped gallery enables flowTop to have higher C trim size, and valve size than all other globe valves on the market.
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Actuator Asmbly
Figure 2: FlowAct 252 ATO/FC Diaphragm Actuator
培训体系的搭建The FlowAct actuator is compact, reversible and capable of accepting air supply pressures up to 90 psi (6.0 bar) allowing the valve to shutoff against high pressure drops.
The FlowTop actuator comes standard with a direct mounted Logix
500 positioner. In all “air to open” applications, no external tubing is required. The direct mount positioner ports air through passages integral to the yoke as illustrated in Figure 2. When the direct mounted positioner is ud, the external supply port is plugged. “Air to clo” applications require external tubing to the top of the actuator. NAMUR positioner mounting is also very simple and easy
with FlowTop (IEC 534.6). When this mounting standard is ud, the internal passageway in the yoke is plugged and external tubing
is ud. The pneumatic diaphragm actuator can operate in temperatures ranging from -400 to 1760 F (-400 to 800C).
Analog or digital positioners ensure high positioner accuracy proportional to the valve instrument signal.
The FlowTop control valve with the pneumatic diaphragm actuator is the solution for most typical general rvice valve applications.
Compact design with many spring ranges available for u with or without a positioner: High quality long life springs properly aligned by Diaphragm capable of 90 psi: Long life rolling diaphragm. Diaphragm asmbly is capable of air supplies up to 90 psi, which minimizes actuator size saving money and Durable, robust, long life actuator stem al. Stabilizes stem travel and prevents side loading of als increasing life over all other diaphragm actuators on the market.
奔跑的人
Radial spring arrangement allows low mounting height
Uninterrupted linear travel, or loss of
operating force: fabric reinforced rolling type diaphragm with minimum area variation
External air supply: mounted positioners u external tubing. The internal passage to the yoke is plugged in the cas.Direct air supply: through the internal passage in the yoke. Available only wit
h direct mount positioners on air to open applications. No tubing is required. The external supply port is plugged in the cas.
High quality ductile iron yoke: A high quality durable solid ductile iron yoke
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Body and Actuator Asmbly
Figure 3: FlowTop Control Valve Asmbly
Upper and Lower Diaphragm Cas
Packing Follower
李白写的诗
External Air Supply
Stem Nut
Bonnet Gasket
Diaphragm Plate
3 Spring
Compression Bolts
Actuator Nut
Body
Stem Guide Name Plate
Ca Bolts
Actuator Stem
Seat Gasket
Springs
Plug
Packing System
Split Stem Clamp
Yoke Nut
Seat Ring
Bonnet Flange (Integral to Bonnet)
Stem Seal Asmbly and Guide Asmbly
Body Bolting
Thread Covers
Packing Studs Plug Stem Yoke
Diaphragm Vent
Bonnet
Features and Advantages
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竞相开放的意思
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Table 1: Parts List
Materials of Construction
什么的目光
