Perforated Plug Low Temperature Type Control Valve
Information
SCL Perforated Plug Low Temperature Type Control Valve
SCL series is specially used in cryogenic services. valve plug and stem extension are double guided.The bottom guiding is located right below the valve seat. Each part which is subject to wear can be individually replaced , and SGC is its base type. The bonnet extension prevents icing of the packing area. The thin walls of the insulation column and of the stem extension allow only a very low conductive heat flow. The bonnet extension length is based on customer requirements.
■ Standard Specification
Valve Body
Type: Cast globe Valve
Nominal Size: DN15, 20, 25, 32, 40, 50, 65, 80, 100,
150, 200, 250, 300
Nominal Pressure: ANSI 150, 300
DIN PN16, 25, 40
JIS 10K, 20K, 30K
GB PN1.6, 2.5, 4.0 MPa
End Connection: Flange ANSI B16.5 RF, RTJ
DIN2543/2544/2545 RF
JISB2201 RF
JB/T81 RF
JB/T82.2 FM
Weld: ANSI B16.5 SW（DN≤50）; BW（DN＞50）
Face to Face Dimension:
ANSI150RF, JIS10K（IEC60534-3-1 37 Series）
ANSI300RF, JIS20K, JIS30K （IEC60534-3-1 38 Series）
ANSI150/300 RTJ （ASME B16.10 CLASS 150/300RTJ）
DIN PN16, 25, 40 （DIN3202-F1）
GB PN1.6, 2.5, 4.0 MPa （ISO5752 1 Series）
Please refer to table 6.1~6.4
Body Material：Please refer to table1 Please refer to figure 3 for Operated Temp. &Pressure Range
Bonnet Type：Low temp. type……-196℃～-46℃
(Please pay attention to the different Temp. &Pressure Range of material)
Packing Material: graphite compound packing、graphite packing,
Operating Temp. &Pressure range is shown in table 2，figure2
Seal Gasket：Spiral wound gasket（PTFE+316、Flexible Graphite+316）,
Graphite with metal gasket（Graphite+316、Graphite+304）
Valve Trim
Plug Type：Perforated cylinder plug
Flow Characteristic：EQ%、Linearity
Trim Material：Plug 0Cr18Ni12Mo2Ti(316Ti) Nitriding treatment, Seat0Cr18Ni12Mo2Ti(316Ti)
Actuator
Type：Multi-spring diaphragm
Air Supply：Max. 6bar
Ambient Temp.：-20℃~+80℃
Spring range：As shown in Table 4.1～4.4
Air Connection：G1/8（SA1）；G1/4（SA2）；G3/4（SA3）
STD Specification：As shown in Table 4.1～4.4
Accessory
Positioner，Filter-regulator valve，Solenoid valve，Limit switch，
Valve position Transmitter，Booster relay，Lock-valve，Handwheel，etc.
Action
Air to open，Air to close
Performance
Range ability：50:1
Seat leakage：Metal seal is according to ANSI B16.104 ClassⅣ，ClassⅤ
Hysteresis：3%（Without Positioner） 1%（With Positioner）
Linearity：±5%（Without Positioner） ±1%（With Positioner）
Rated CV：As shown in table 4
Allowable pressure differential：As shown in table 4.1~4.4
Figure Size：As shown in figure5.1，5.2，table 5.1~5.4
Weight of product：As shown in table 5.1~5.4
■ Specifications：
○Special inspection
Flow characteristic test，material test，low temperature test，steam test，non-damages test
○copper-free treatment
○non-standard painting
○dust and sand proof
○vacuum service
○tropical area proof
○completely oil-free，water-free treatment
○special air piping and fitting
○strong corrosion proof
○stainless steel bolt and nut for exposed parts
○cold area proof
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