Wcb Cast Iron Ht200 Epdn Nr NBR Manual Sdv Straight-Through Diaphragm Valve

• Customization: Available
• Media: Gas, Oil, Water, Chemical, Steam
• Temperature: -40℃ ~ +180℃
• Actuator: Manual, Pneumatic
• Connection: Flanged Diaphragm Valve
• Material: Cast Iron, Carbon Steel Wcb, Stainless Steel 304/3
• Structure: Through Way Diaphragm Valve
• Pressure: 0.6-1.6MPa
• Flow Direction: Unidirection
• Function: Intelligent Type
• Usage: Flow Control
• Standard: DIN, GB, ANSI, BSW, JIS
• Delivery Time: 15-25 Days
• Coating: Customized
• Design: BS 1868 / ASME B16.34
• Size: DN15-DN1200
• End Connection: Flange
• Face to Face: ASME B16.10
• End Flange: ASME B16.5
• Certificates: CE/ISO/SGS/Mtc
• Transport Package: Wooden Case
• Specification: customized
• Trademark: Yoonad
• Origin: China
• HS Code: 8481804090
• Production Capacity: 10000PCS/Year
• Package Size: 30.00cm * 36.00cm * 40.00cm
• Package Gross Weight: 12.000kg

Product Description

Straight-through Diaphragm Valve (SDV)

The straight-through diaphragm valve is a mainstream type of diaphragm valve, characterized by a full straight-through flow channel without weir platform inside the valve body. It features extremely low medium flow resistance, no medium retention dead corners, and excellent flow capacity, which is especially suitable for the transportation of low-viscosity, large-flow media in industrial pipelines.

Main Advantages

• Full straight-through flow channel, low flow resistance and large flow capacity;
• The diaphragm isolates the medium from internal parts, no corrosion and zero external leakage;
• Simple structure, easy maintenance and low replacement cost of wearing parts;
• Various driving modes (manual, pneumatic, electric) are optional to meet automatic control requirements.

 

Key Technical Parameters

1. Valve Body Material: Cast iron, Carbon steel WCB, Stainless steel 304/316 (PTFE lining optional for corrosive working conditions).
2. Diaphragm Material (Core): EPDM (standard), NR, NBR, PTFE (for strong corrosion).
3. Nominal Pressure: PN0.6 ~ PN16 (0.6MPa ~ 1.6MPa).
4. Temperature Range: -40ºC ~ +180ºC (depends on diaphragm material).
5. Nominal Diameter: DN15 ~ DN600 (Threaded connection for DN15-DN50, Flanged connection for DN25-DN600).
6. Internal Parts Material: Stainless steel 304 (valve stem, pressure plate), cast steel (valve cover).
7. Sealing Class: GB/T 13927 Class (no visible leakage).

 

 

 

Dimension Table for PTFE-lined Straight-through Diaphragm Valve (PN16, Flanged Connection, GB/T 9113-2010 Standard)

Nominal Diameter (DN/NPS)	Nominal Pressure (PN)	Flange Outer Diameter (D, mm)	Bolt Circle Diameter (K, mm)	Number of Bolts	Bolt Size (mm)	Flange Thickness (C, mm)
DN15 (1/2")	PN16	95	65	4	M12	14
DN20 (3/4")	PN16	105	75	4	M12	14
DN25 (1")	PN16	115	85	4	M12	14
DN40 (1½")	PN16	145	110	4	M16	16
DN50 (2")	PN16	165	125	4	M16	16
DN80 (3")	PN16	200	160	8	M16	18
DN100 (4")	PN16	220	180	8