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BALANCING VALVE SCREWED TYPE

balancing-valve-1 balancing-valve-2

FIXED ORIFICE DOUBLE REGULATING VALVE

Model: GDRV-101
15mm (1/2″) ~ 50mm (2″)

 

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APPLICATION

Tozen Double Regulating Valves are installed and used in centralized heating and cooling systems to obtain design flow rates of each terminal units and balancing the circuits in the building.

FUNCTION
  • Balancing
  • Measuring
  • Pre-setting
  • Isolating
FEATURES
  • Y-pattern globe design.
  • Integral fixed orifice plate to form a fixed orifice flow measurement unit with regulation and isolation function.
  • Accuracy of +/-5% at full open position of the valve.
  • Equipped with 2 measuring nipples for differential pressure measurement.
  • Microset handwheel adjustment with easily readable settings.
  • Multi-turn adjustment range for maximum flow control.
  • Double regulating feature allows valve opening to be set with allen key.
  • Long neck for thermal insulation.
  • Bronze body of PN25 pressure rating.
  • Comply to BS 7350.
SPECIFICATION
Type Fixed orifice
Size range 15mm~50mm
Max. working pressure 25bar
Testing pressure 37.5bar (Shell)
27.5bar (Seat)
Working temperature -10°C to 120°C
Connection  BS 21 (ISO 7)
ANSI B1.20.1
Standard Comply to BS 7350
MATERIALS
Part Material ASTM EN
Body Bronze B62 B83600 EN1982 CC491К
Bonnet DZR Brass B453 C35330 EN12165 CW602N
Stem DZR Brass B453 C35330 EN12165 CW602N
Disc DZR Brass B453 C35330 EN12165 CW602N
Orifice Insert DZR Brass B453 C35330 EN12165 CW602N
Measuring Nipples DZR Brass B453 C35330 EN12165 CW602N
O-Ring EPDM – –
Handwheel ABS – –
DIMENSIONS & COEFFICIENTS
Size
(mm)		 L
(mm)		 H
(mm)		 Weigh
(Kg)		 Kvs
15 90 109 0.6 2.20
20 98 110 0.6 4.60
25 105 125 0.8 8.50
32 120 128 1.1 16.70
40 130 145 1.4 26.10
50 150 148 20. 43.20

Note: Kvs at fully open position.

Installation
  • The Double Regulating Valve shall be installed with the arrow marking on the valve body in accord to the same flow direction in the pipe. It may be installed at any angle.
  • Use adequate seal material to protect the thread on pipe  side from leaking or rusting. for connection, use proper tool (spanner, etc) to screw correctly in accordance to thread standard. Do not connect by using wrench on valve side.
  • Up and down stream from the valve is required to avoid turbulence which will affect the accuracy.
FLOW MEASUREMENT GRAPHS

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