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SYV78 Unbalanced Cage Regulating Valve
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Product classification
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Product Details
SYV78
Unbalanced cage regulating valve
Linear Stroke Regulating Valve
Product overview
The SYV78 unbalanced cage regulating valve produced by foreign technology is a single-seat barrel regulating valve. The valve core has no pressure balance hole, the valve body has a compact structure, the fluid passage is S-streamlined, and it is provided with a guide wing to improve the smooth flow of surrounding fluid. The pressure drop loss is small, the flow rate is large, the adjustable range is solid and wide, and cavitation corrosion resistance is achieved. High accuracy of flow characteristic curve.
Regulating valve has excellent closed sealing, valve seat leakage compared to a single seat level, regulating valve with multi-spring film actuator, compact structure, large output force. Can be widely adapted to the requirements of low noise, cavitation corrosion, sealing requirements of the occasion.
Standard technical parameters
Valve body
Type: straight-through single-seat casting ball valve
Nominal diameter: 40-200mm
Nominal pressure: ANSI 125, 150, 300, 600 J1S10, 16, 20, 30, 40K PN1.6, 4.0, 6.4MPa
Connection type: Flange type: FF, RF, RJ and LG
Standard according to JNS1 B 16.5,JSB2201
JB/T79.1 PN1.6 MPa
JBT79.2 Convex Surface
Welding type: Slay welding SW(40-50mm)
Butt Weld BW(65-200mm)
Material: ZG25
ZG1Cr18Ni9 ZGOCr17Ni12Mo2
SCPH21 SCPH61 Title
Upper valve cover: normal temperature type (P):-17~230 ℃
Elongation type I (E1):-45~17 ℃, 230~566 ℃
Elongation Type II (E2):
Integral (E21):-100 ~-45 ℃
Welding type (E2W):-196 ~-100 ℃
Gland type: bolt compression type
Filler: V-type PTFE filler, impregnated with PTFE, asbestos filler, graphite braided filler.
implementing agency
Type: HA multi-spring film actuator.
Spring range: 0.02-0.10,0.08-0.24MPa
Air supply pressure: 0.14,0.30,0.40MPa
Air supply connector: Rc1/4
Ambient temperature:-30~70 ℃
Valve action type: gas open or gas closed
Performance
Discharge: in line with standard ANSI B16.104IV, less than 0.01% of rated Cv.
Return difference: 3% (without locator)
1% (with locator)
Linearity: ± 5% (without positioner)
± 1% (with positioner)
Note: Use standard V-type PTFE packing.
Adjustable range
50:1
Remarks:
1. P = normal humidity type, E1 = elongation type I, E2 = elongation type II, E21 = integral type, E2W = welding type.
2. The size of column H on the table is the value of the regulating valve without handwheel mechanism. If it is equipped with top-mounted handwheel mechanism, the size of handwheel mechanism shall be added accordingly.
Check the technical parameter table of the HA actuator.
3. Elongate the size of E1 column of type I, with valves with JIS 10K and ANSI 125,150 on the left and valves with JIS 16K and ANSI 300 or more on the right.
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