Waterworks

DOROT S500 FLDI/PS

Diaphragm-actuated, Rigid Seal, Y-pattern, Differential Float Level Control & Pressure Sustaining Valve

DOROT S500 FLDI/PS, is a Diaphragm-actuated, Rigid Seal, Y-pattern, Differential Float Level Control & Pressure Sustaining Valve. When this automatic, float actuated and pressure sustaining, pilot-controlled valve opens, it sustains a minimal required upstream pressure as water levels reach a set opening height, and closes when it reaches a set lower / higher level. The differential between opening and closing levels is adjustable. In cases where the upstream pressure is lower than the set-value, the valve will maintain a closed position, regardless of water levels.

Downloads

BIM Models

Technical Specifications

Size Unit

Size range

DN40 - DN150 (1½”- 6")

Pressure rating

PN16

Working temperature

0ᵒ – 60ᵒ C

End connection type

Threaded, Flanged, Grooved

Standard construction materials

Body and Cover

Ductile Iron

Internal Parts

Stainless Steel and Polymer

Seals + Diaphragm

EPDM

* Other optional materials available upon request

Features & Benefits

Regulates at a stable mode, down to near-zero flow
  • Ensures consistent performance without the need for specialized low-flow adjustments, such as a V-port or bypass valve
Low-friction internal trim design, guided by LTP (Linear Throttling Plug)
  • Provides high reliability and operational stability
Compact design
  • Short face-to-face valve dimensions save on installation space, ideal for compact system layouts
Stainless Steel control port sleeves
  • Protects against corrosion and blockage, reducing time and cost on maintenance
Self-cleaning inline filter
  • Cuts down on frequency of inspections and maintenance, significantly reducing labor costs
Safety air release
  • Easily removes air from the control valve chamber, to ensure stability and optimal system performance
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