Butterfly valve JHP - Fluid Control Services

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Butterfly valves JHP Performances Factory tests: Every single JHP valve undergoes hydraulic tests in accordance with ISO 5208 and NFE 29311 standards: 1) For tightness at 1.1 x rating (tightness rate according to NFE 29311 : rate 3). 2) For body strenght at 1.5 x rating. Other specific tests on request. 6 Maximum working pressure: • DN 50 to 250 : PN 25 • DN 300 to 700 : PN 20 Temperature range: • – 50 °C to + 260 °C Vacuum: • 1 Torr Flow chart
Headloss coefficient Kα in full opening (α = 90°) The formula of the headloss with a disc opening angle α is: High performances Hydraulic characteristics Inches 2” 2” 1 / 2 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24” 28” DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 Kα 0.76 0.65 0.64 0.64 0.58 0.56 0.48 0.48 0.48 0.45 0.45 0.45 0.45 0.44 0.43 RELATION BETWEEN Kα and K v : With D in meter. Flow coefficients K v and C v The flow coefficient K v is the flow in m 3 /h of water, at an average temperature of 20 °C, flowing through the valve with creating a headloss of 1 bar. ρ Vα 2 ∆Pα = ———— Kα —— 10 000 2g in which: ∆Pα : headloss in a valve opened to an angle α (expressed in bar) Vα : velocity of the fluid in a pipeline of diameter equal to the one of the valve expressed in m/s when the valve is opened to an angle α ρ : specific weight of the fluid in Kg/m 3 g : acceleration of gravity in m/s 2 Kα : headloss according to the angle of opening. NOTA : in the case of water, the formula is simplified: Vα 2 ∆Hα = Kα —— 2g ∆Hα : headloss in the valve opened to an angle α expressed in meters of water column. Inches 2” 2” 1 / 2 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24” 28” DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 K v 115 210 320 500 820 1 200 2 300 3 600 5 200 7 300 9 500 12 000 14 800 21 600 30 200 C v 133 244 371 580 951 1 392 2 668 4 176 6 032 8 468 11 020 13 900 17 200 25 000 35 000 SIMPLIFIED FORMULA for calculation of the headloss: The relation between C v and K v is: Headloss 7 C v = —— K v 6 Non compressible Fluid Gas NOTA: These formula are only used when the DN is equal to the pipe diameter. K v : Flow coefficient of the valve Q : Flow in m 3 /h ∆ p : Headloss in the valve in bar P 1 : Upstream pressure in bar P 2 : Downstream pressure in bar Q N : Flow in normal conditions (0 °C, 760 mm Hg) in m 3 /h T : Temperature of the fluid in °K ρ 1 : Density of the fluid in kg/m 3 ρ N : Density in normal conditions in kg/m 3 7
Page 1 and 2: Butterfly valves JHP NC 1481-01.A
Page 3 and 4: JHP The seat is made of filled PTFE
Page 5: No leakage 1 Seat Leak tightness is
Page 9 and 10: Standard valve JHP DN 50 - 700 / 2
Page 11 and 12: Pulp and Paper valve “P” DN 50
Page 13 and 14: Lockable lever ductile iron “LF
Page 15 and 16: Technical data - Electrical supply:
Page 17 and 18: J C L F K ∅ D AB H E* J C L F K
Page 19 and 20: PROXIMITY DETECTORS IN BOX • Box
Page 21 and 22: JHP Wafer type Number of thru-bolts
Page 23 and 24: Every JHP butterfly valve is identi

Butterfly valve JHP - Fluid Control Services

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