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Technical Information - Type 'D60' Series

Valve Pic

The ‘ROMA’ Type ‘D60’ Float Valve is hydraulically operated, single seated, piston actuated, internal pilot and float controlled.

At full supply level, inlet pressure is retained within the piston chamber by the pilot valve, equalising pressures across the piston, and permitting inlet pressure to close the valve.

As supply level falls, the pilot valve discharges internal pressure allowing inlet pressure within the valve to act upon the larger piston area to lift the valve to a modulating opening.

The angle type Fig. No. 145A valve is ideally suitable for end of line services in make-up water and service water tanks, etc., whereas the globe type Fig. No. 145 in the larger sizes are used for surface reservoirs.

Water supply authorities and industry throughout Australia accept the robust reliable design and construction which utilises proven materials.
 

Dimensions (mm)

Valve Size 50 80 100 150 200
'A' 120 130 180 220 230
'B' 120 130 180 220 230
'C' 250 360 380 400 510
Mass / kg 26 40 60 120 190

Specifications

Flanges AS 2129 Tables E and F
Working Pressure Table E 1400 kPa
Table F 2100 kPa
Temperature Range 5 - 60oC

Materials

Body and Cover: Cast Iron AS 1830/T250
Valve Carrier 50-300mm Bronze AS 1565/836B
400-610mm Cast Iron AS 1830/T250
Internal Parts Bronze AS 1565/836B
Grade 316 Stainless Steel
Coatings Optional (0.5mm min. D.F.T.)
Valve Disc and Seals Polyurethane, Neoprene
Spindle, Links & Pins 316 Stainless Steel
Grade Float Arm SS Tube or Steel-Galvanised
BronzeFloat Plastic, Copper or Coated Steel

Recommended Maximum Flows (l/sec.)

Valve Size 50 80 100 150 200 250 300 400 450 500 610
Normal Max.
Vel. 6m/sec.
10 20 40 80 190 300 430 770 970 1190 1720
Occasional Max.
Vel. 8m/sec.
13 30 55 110 250 400 570 1020 1300 1590 2290