SDP Top and Bottom Double Guiding Parabolic Plug Type Contro

Metal-seated quick-changeable trim combination with top and bottom guiding. This double guiding construction stabilizes stem and plug over the full travel range. The bottom guiding is located right below the seat ring and can be easily replaced. Most conventional body designs with top and bottom guided trim have a bolted bottom flange which requires an extra body gasket plus the risk of additional external leakage.

SDP is recommended for large pressure drop, high flow rate and instability fluids applications.

■    Standard Specification

Valve Body

Type: Cast globe Valve

Nominal Size: DN 40, 50, 65, 80, 100, 150, 200, 250,

300, 350, 400

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：STD type……-46℃～200℃; 200℃～300℃

Radiation fin type……300℃～530℃

(Please pay attention to the different Temp. &Pressure Range of material)

Packing Material：PTFE V-ring compound packing、graphite compound packing、

graphite packing,

Operating Temp. &Pressure range is shownn 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：Parabolic column plug

Flow Characteristic：EQ%、Linearity、Quickly opening(Please refer to figure4)

Trim Material：Please refer to table 3 for STD material assembly，operated Temp. &Pressure Range

Actuator

Type：Multi-spring diaphragm

Air Supply：Max. 6bar

Ambient Temp.：-20℃~+80℃

Spring range：As shown in Table 5.1～5.5

Air Connection：G1/8（SA1）；G1/4（SA2）；G3/4（SA3）

STD Specification：As shown in Table 5.1～5.5