Pneumatic Cage Guided Single Seated Globe Control Valve

Pneumatic Cage Guided Single Seated Globe Control Valve

Cage guidedsingle seated control valveis used to control fluid flow,pressure and high load conditions.The valve body of thissingle seated globe control valveis compact in structure,and the fluid passage is S streamlined,allowing for large circulation capacity , wide adjustable range,and high flow characteristic accuracy.The guide portion of the plug has a large guiding area and is characterized by strong anti-vibration performance.The seat sealing performance is in accordance with IEC or GB standards. This气动single seated control valveis equipped with a multi-spring type diaphragm actuator. The structure is compact and the output force is large. The single seated control valve is widely used in the pipeline occasions requiring high shut-off performance,low temperature and high pressure .Due to the wide range of materials and the variety of design forms,these valves can be used in different industrial fields (such as chemical,electric power,paper, food,metallurgy,mining,etc).

The Design Characteristics of Pneumatic Single Seated Control Valve:

1. The valve seat adopts the snap-in structure,which can avoid the defect of the snagging type.When the upper cover is pressed,the valve core and the valve seat are automatically centered, and the installation and disassembly is simple and convenient. Even in the case of severe corrosion, the valve seat is easily removed for maintenance.
2. The valve core and the valve stem adopt an integrated structure, which avoids the defects of the plug-in type. Even in the case of high pressure difference,the stability of the valve stem can be ensured;
3. Balanced and unbalanced valve plugs have high cut-off sealing performance in the entire flow and characteristics range;
4. Metal seals and soft seals have the same flow coefficient;
5. The balance valve plug is used in the globe control valve to withstand a relatively large allowable pressure difference;
6. Special surface treatment of the valve inner parts——polishing,nitriding and Stellite resurfacing welding to extend the service life of the regulating valve,the workpiece is more reliable;
7. Adjustable ratio is to 50:1,and 100:1 can also be customized;
8. Use high grade non-asbestos seal or bellows seal;
9. Multi-spring pneumatic actuator can realize direct acting and reverse acting.The spring range can be adjusted without adding other parts. The direct acting actuator can realize the air-to-close operation,and the reverse acting actuator can realize the air-to-open operation.
10. It can be equipped with pneumatic actuator, electric actuator and electro-hydraulic actuator.

Structure and Parameters of Pneumatic Single Seated Control Valve:

Parameters & Property of Pneumatic Single Seated Control Valve:

Body/Bonnet :	WCB,LCB,WC6,WC9,CF8,CF8M,CF3, CF3M
Plug Material:	F304,F316,etc
Seat Material:	F304,F316,etc
Resurfacing Welding:	tungsten carbide,soft seal
Stem Material:	17-4PH ASTM A276 F304
Upper Bonnet Type	1.Standard Type:-17~+230℃ 2.Extended ⅠType:-45~+17℃ or more than 230℃(heat dissipation type) 3.Extended ⅡType:-45~-100℃ 4.Extended Ⅲ Type:-196~-100℃ 5.Bellows sealing type(forming type/welding type) 6.Steam Jacket Type

Body Type	staight-way/angle/jacket insulation
Packing:	PTFE/asbestos/graphite
Gasket:	Flange(RF,FM)
Leakage Class:	1.Metal seal:ANSI B16.104 Ⅳclass (ANSI B16.104Ⅴ类是可用的) 2.Soft seal:ANSI B16.104 Ⅵ class
Flow Characteristic:	HG20592-2009,ANSI B16.5
反对nection Type:	flange(RF/FM),butt welding
Flange Connection Type Standard:	HG20592-2009,ANSI B16.5
Rangeability:	50:1 (100:1 can be customized)
Actuator:	气动diaphragm/pneumatic piston/electric/ 电动液压执行器

Actuator Technical Parameters of Pneumatic Single Seated Control Valve:

Actuator Type	Pneumatic Diaphragm Type
Air Supply Pressure	140KPa	340KPa
Spring Range	(20-100KPaG)	(80-240KPaG)
Electric Connection	NPT1/4、NPT3/8
Directing Acting	Valve close when air pressure increasing
Reverse Acting	Valve open when air pressure increasing
Backlash	<1.5% （with positioner）
Dead Zone	<1% （with positioner）
Temperature	-10〜70°C
Painting Color	Light green
Accessories	Positioner,solenoid valve,limit switch,filter pressure reducing valve,lock valve,air control valve

Rated Cv and Travel of Pneumatic Single Seated Control Valve:

DN	Seat Size	Rated Cv(EQ%)	Rated Cv(Quick Open Linear)	Travel
20	6	0.32	—	16
	8	0.8	—	16
	10	1.6	—	16
	15	4	—	16
	20	6.3	10	16
25	6	0.32	—	16
	8	0.8	—	16
	10	1.6	—	16
	15	4	—	16
	20	6.3	10	16
	25	10	16	16
32	32	17	25	16
40	40	24	35	25
50	50	44	55	25
65	65	68	85	40
80	80	99	135	40
100	100	175	210	40
125	125	275	345	60
150	150	360	466	60
200	200	640	735	60
250	250	960	1000	100
300	300	1300	1500	100

Required Information When Ordering Pneumatic Single Seated Globe Control Valve:

1.Working medium and temperature,medium density;
2.Pre-pressure and back-pressure of thesingle seated control valve;
3.max/normal/min flow for the气动single seated control valve;
4.Connection method,operation mode,fault location;
5.Pipe diameter/ nominal diameter/ nominal pressure;
6.Accessories: positioner,solenoid valve,filter pressure reducer, limit switch,lock valve, etc.;