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Side mounted eccentric hemispherical valve
Model: PQ340F
Nominal diameter: DN40 ~ 1600mm
Nominal pressure: PN0.6 ~ 4.0MPa
Temperature: -29 ℃ ~ + 540 ℃
Operation: manual, electric, pneumatic
Body Material: QT450, WCB, ZG20CrMo, ZG1Cr18Ni9Ti
Design Manufacture standard: GB / T 12237-2007
Construction length standard: GB / T 12221-2005
Connection flange standard: GB / T 9113
Pressure temperature grade: GB / T 12224-2005
Test standard: GB / T 13927-2008
Product details

Product details:

Eccentric hemisphere valve structure using eccentric - tight principle through the transmission mechanism to achieve the purpose of regulating, closing, sealing pair is a metal surface with hard-surface contact seal, double-eccentric structure in the open when the spool is located in the Tibetan ballroom, circulation Large cross-section, and the valve is not washed, the valve core is not washed off, open the valve into the spherical surface along the gradual gradual removal of effective scaling obstacles to achieve a reliable seal. It is particularly effective for mixed flow delivery of two-phase flow-prone fouling solids. The second feature of the valve hemisphere with bimetallic, base metal surfacing on different alloys, the valve seat is also the corresponding surfacing by special treatment, the sealing surface into anti-corrosion, wear-resistant, high strength and other types to meet different The third characteristic seal is strictly prohibited, and the harmful gas can be transported to zero leakage. The fourth characteristic is that there is a compensation amount for the valve core of the sealing pair. When the valve seat is worn (the valve seat hardness is lower than the valve core), when the valve is closed Then a little rotation, still reliable seal, to extend the service life, in addition, the user will squeeze the nut twist off, seat adjustment or replacement is still available, to avoid the current failure of many valve seal failure of the entire drawbacks.

Therefore, surfacing welding alloy (or composite ball) bimetal sealing pair can be used for wear-resistant, corrosion-resistant, temperature-resistant and also require strict sealing of different industrial sectors.

The main purpose of ball valve and product features:

1, common valve: Specifications Model PN1.0-4.0Mpa, DN40-1600. Suitable for sewage treatment, pulp, urban heating and other demanding applications.  

2, special valve for oil chemical industry: Specifications DN40-1600, PN1.0-4.0Mpa for crude oil, heavy oil and other oil products, weak corrosive chemical industry, two-phase mixed flow media. Temperature up to 425 ℃.  

3, gas-specific valves: Specifications DN40-1600, PN1.0-4.0Mpa for gas, natural gas, liquefied gas transport control. Product structure is characterized by welding of different seals of chromium-containing stainless steel, tight seal, anti-corrosion.  

4, Slurry valve: DN40-1600, suitable for liquid, solid phase two-phase mixed flow or liquid transport chemical reaction crystallization or scaling of industrial pipelines. Product Structure Features According to customer demand medium, the temperature requirements are different, the seal of the valve core deposited with chromium molybdenum vanadium alloy surfacing, the valve seat with chromium-molybdenum alloy, chrome alloy, stainless steel alloy electrode surfacing to meet the needs of different slurry delivery.  

 5, special coal ash slag valve: Specifications DN40-1600, suitable for power plants, hydraulic slag or gas pipeline control. Product requirements wear resistance, the spool with a combination of ball bimetal, has a very high stiffness and very wear-resistant, seat with the overall wear on the 1st or the entire surfacing, and has the advantages of hard-sealed ball valve. 
 Ball Valve Features:
 1, circulation area, flow resistance is small. This is because the spool is located in the possession room after opening, fluid through.

2, the operating torque is small, turn 90 degrees to open and close to complete, light operation.

3, tight seal, double eccentric metal seal. Fouling does not affect the opening and closing, which is the most significant advantage of the hemisphere valve

4, long life, seal wear, and a compensation amount, the valve seat can be adjusted or replaced.

Parts materials and conditions:

name Material
Body QT450, WCB, ZG20CrMo, ZG1Cr18Ni9Ti
Valve shaft 2Cr13, 1Cr13
Disc Alloys nitrided steel, nitriding stainless steel, wear-resistant steel
Seat Alloys nitrided steel, nitriding stainless steel, wear-resistant steel
Bearing Aluminum bronze, FZ-1 composite
filler Teflon, flexible graphite

 The main performance parameters:

Nominal pressure (Mpa) 0.6 1.0 1.6 2.5 4.0
Nominal diameter (mm) 40-1600 40-1600 40-1200 40-600 40-600
Seal test pressure (Mpa) 0.66 1.1 1.76 2.75 4.4
Shell test pressure (Mpa) 0.9 1.5 2.4 3.75 6.0
Applicable temperature (℃) -29 ~ 300, -29 ~ 425, -29 ~ 540
Suitable media Water, seawater, sewage, acid and other liquids, slurry, steam, gas, oil
Drive mode Manual, electric, pneumatic
Connection Type Flange connection, the folder connection
Installation method Vertical installation, horizontal installation

 Shape and connection dimensions

Nominal diameter L D D1 D2 N-φ b f
50 178 160 125 100 4-18 16 3
65 190 180 145 120 4-18 18 3
80 203 195 160 135 8-18 20 3
100 229 215 180 155 8-18 20 3
125 254 245 210 185 8-18 22 3
150 267 280 240 210 8-23 24 3
200 292 335 295 265 12-23 26 3
250 330 405 335 320 12-25 30 3
300 356 460 410 375 12-25 30 4
350 381 520 470 435 16-25 34 4
400 406 580 525 485 16-30 36 4
500 457 705 650 608 20-34 44 4
600 508 840 770 718 20-41 48 4