Quality Inspection for Globe Control Valve With Pneumatic Actuator And Smart Positioner - stainless steel pneumatic 3 way mixing/diverting regulating valve – Hoyee

1.compact structure, light weight, sensitive action, low pressure drop loss, new high allowable pressure, large valve capacity, accurate flow characteristics and convenient maintenance, etc.,
2.Pneumatic 3 way mixing regulating valve can be used for various working conditions, especially for the temperature control system of oil industry heat exchange and automatic control of other industries.
3.Spool structure with side guiding, well stability, no vibration, low noisy, Pneumatic 3 way mixing regulating valve can bear high pressure difference, easy for connection.
4.While with low nominal size and pressure difference, 3 way mixing regulating valve can be used in diverting occasion. However, while nominal size higher than DN100 and high pressure difference, Pneumatic 3 way mixting regulating valve and Pneumatic 3 way diverting regulating valve can’t be exchanged.

Specification

Pneumatic 3 way control valve Body type:	3-way casting globe type
Spool type:	3-way double seat spool
Nominal size:	DN20~300 NPS 3/4〞~ 12〞
Nominal pressure:	PN16 ~ 100、 CLASS 150LB ~ 600LB
Connection: flange:	FF、RF、MF、RTJ
Welding:	SW、BW
Flange dimension:	According to to IEC 60534
Pneumatic 3 way control valve Bonnet type:	Ⅰ:standard type（-20℃~230℃） Ⅱ:Radiator type: （-45℃~ high than 230℃ occasion） Ⅲ:Low temperature extended type（-196℃~ -45℃） Ⅳ:Bellow seal type Ⅴ:Warm insulation Jacket type
Packing:	V type PFTE packing, flex. graphite packing, etc.
Gasket:	Metal graphite packing
Control valve Actuator:	Pneumatic:multi-spring diaphragm actuator, piston type actuator.

Material list

Component name	Control Valve Material
Body/Bonnet	WCB/WCC/WC6/CF8/CF8M/CF3M
Valve spool/Seat	304/316/316L(overlaying stellite alloy)
Packing	Normal:-196～150℃ is PTFE,RTFE,>230℃ is flexible graphite
Bellow	304,316,316L
Gasket	Normal:Stainless steel with flexible graphite,Special:Metal tooth type gasket
Stem	2Cr13/17-4PH/304/316/316L
Diaphragm Cover	Normal:Q235,Special:304
Diaphragm	NBR with reinforced polyester fabric
Spring	Normal:60Si2Mn,Special:50CrVa

Valve performance

Pneumatic 3 way control valve Flow characteristic	Linear, percentage
Allowable range	30: 1
Rated Cv value	Percentage / linear CV8.5~1280
Pneumatic 3 way regulating valve/control valve Allowable leakage	Metal seal:  IV grade（0.01% rated capacity） Leakage standard:  GB/T 4213
Pneumatic 3 way control valve Performance
Intrinsic error(%)		±1.5
Return difference(%)		≤1.5
Dead zone(%)		≤0.6
Difference from beginning to end point(%)		±2.5
Rated travel difference(%)		≤2.5

Valve Special Requirment

Special test	Material penetration flaw detection (PT), radiator test (RT), flow characteristic test, low temperature test.
Special treatment	Trim nitrogen treatment, seat hard alloy treatment.
Special rinse	Degreasing and dehydration treatment
Special condition	Special piping or connection, vacuum condition, S.S fastener, special coating.
Special dimension	Customized face to face length or dimension
Test and inspection	Third party test report

Technical parameter

Seat diameter（mm）

25

32

40

50

65

80

100

125

150

200

250

300

Rated flow coefficient, CV

8.5

13

21

34

53

85

135

210

340

535

800

1280

Nominal size

Travel

Option flow coefficient Cv（★standard ●recommended）

DN25

16 mm

★

DN32

25 mm

★

DN40

●

★

DN50

●

●

★

DN65

40mm

★

DN80

●

★

DN100

●

●

★

DN125

60mm

★

DN150

●

★

DN200

●

●

★

DN250

100mm

●

●

★

DN300

●

●

★