- Valves[6]
- Contact Person : Mr. Hsu Jasper
- Company Name : Suzhou Delan Energy Science & Technology Co., Ltd.
- Tel : 86-512-65786108
- Fax : 86-512-65786208
- Address : Jiangsu,Suzhou,Caohu Industrial Park of XiangCheng Economic Development Zone.
- Country/Region : China
- Zip : 215131
Related Product Searches:Power Plant Main Feed Water Control Valve,High Quality,feed water control valve, globe control valve,KG Series
Electric actuator operated power plant boiler main feed water control valve
Feed-water flow control valves are used as control valve at 100% load of the feed pump is not provided with a speed control. Feed-water control valves are used for start-up of the boiler load (with/without variable speed pump).
Operation Conditions
The main Feedwater Control Valve is a high pressure usually requires a cage guided control valve for control characteristics and economy of actuator size. During startup and shutdown this application can see high pressure and differential, requiring cavitation trim to prevent damage. Usually a startup feedwater valve is installed parallel to main feedwater valve with cavitation trim.
The most common problem is selection of proper body and trim for the conditons. Many times body velocities can exceed 30 feet per second. Carbon steel bodies will erode over time, WC9 is the choice when velocities exceed these levels on a continuous bases.
Type: straightway globe type valve
Connection type: RF & RTJ ANSI B16.5
BW ANSI B16.25
Size:2"~14"
Pressure: ANSI Class 900lb~~2500lb
Body materials: A216 WCB, A217 WC9, A217 C5, CF8(304), CF8M(316), CF3(304L) CF3M(316L) 20 alloy, Monel titanium alloy etc. or depend on customer's special request.
Trim Assembly
Plug Type: Balanced plug; Solid plug; Self-cleaned plug
Flow Characteristic: Equal Percentage/Linear Quick Opening
inner materials: ASTM A276 431, ASTM A276 420, 440C, 630 Stainless steel, 316,316L with Stellite, or other materials provided according to customer's requirements.
Actuator
Select by manufacturer or according to customer's requirment.
Accessory
Select homemade or imported electric/pneumatic valve positioner, according to customer's requirement.
Main parts materials
parts | material | parts | material |
body | A216 WCB, A351 CF8M etc. | packing | Flexible graphite |
seat ring gasket | Flexible graphite+loop board | gland | ASTM A182 F316, A276 |
seat ring | ASTM A276 431 | stem | ASTM A182 F316, A276 |
spiral wound gasket | ASTM A276 431 | cover board | ASTM A29 1045 |
disc | Flexible graphite+316 | bonnet | A216 WCB, A351 CF8M etc. |
Bonnet gasket | Flexible graphite+loop board | cage gasket | Flexible graphite+loop board |
Main nuts | ASTM A29 1045 | Main bolts | ASTM B7 |
Note: Other materials are available upon request.
PS: When ordering, please specify nominal pressure, bore diameter, working pressure and temperature, max flow, max design pressure differential, medium, type of actuator and connection standard etc.
Power Plant Main Feed Water Control Valve