Fire Protection Div. Dorot Fire Protection Division Models, & 6 PS\ UL Pressure Relief Valve Certification & compliance by design -PS\UL ANSI FCI - Class VI seat leakage class Fire tested to EN ISO 6-:6 UL listed under QXZQ category Lloyd's type approval Designed for Maintaining a steady preset system pressure, regardless of fluctuating supply Automatically relieving over-pressure, should upstream pressure exceed the required set point Protecting the system by accurately limiting maximum pressure High flows and working pressures (up to PN/psi) Industrial, commercial & building fire suppression Features Superior design featuring exceptionally low pressure losses at high flow rates. Low to negligible lifelong maintenance costs thanks to no wetted metallic and mechanical moving parts design Simple, comprised of main parts, no expertise required for maintenance Simple field-adjustable pressure setting, requiring no special tools and with no system down time Fresh or brackish water, seawater and foam * Out-of-the-box fully assembled & tested valves. Extensive valve & trim materials selection and corrosion protection coating to EN C,C & CM * Consult with Dorot Typical applications Pumps and water tanks Fire suppression systems Petrochemical, Oil & Gas Installations Tunnels Power Generation, Transformer & Transmission Plants Onshore-offshore Mining 6-PS
Fire Protection Div. Models, & 6 PS\UL General description Dorot models, & 6 valves are automatic, hydraulically actuated, diaphragm operated, globe/ weirtype control valves. The valves are designed for use in fire protection applications including deluge, pre-action, pressure control, water, foam and seawater fire protection systems. The valves consist of three major components: the body, the cover and the diaphragm assembly. PS\UL Unique design The Dorot valve model PS\UL is a pilot-controlled, pressure-relief valve, actuated by the pipeline pressure. The valve accurately maintains a set pipeline pressure regardless of pump start and stop conditions. The relief pressure can easily be set and modified by use of the adjustment bolt on the pressure relief pilot s cover. When the pipeline pressure exceeds the required set point, the valve modulates to maintain a steady, predetermined pressure in the network. When pressure falls below the set value, the valve closes drip tight. The PS\UL s trim contains an integral and adjustable needle valve which enables high pilot accuracy and control of the valve s closing speed. The valve s low-friction design utilizes a pre-shaped reinforced diaphragm and provides exceptionally low pressure losses at high flows and an accurate, stable control from no-flow to full flow conditions. The simple and reliable design allows easier assembly, improved longevity and reduces periodic inspections and maintenance. When required, maintenance is easy done on-site and in-line. Operation modes,,6-ps\ul,,6-ps\ul Fully Fully Closed Closed Position Position - "-" - "-" Fully Fully Fully Closed Closed Position Position Position - "-" -- "-" Fully Closed Position - "-" Fully Closed Position - "-" 6 6 Pressure Relief - "-" Pressure Relief Relief - "-" - "-" Pressure Relief - "-" - "-" Pressure Relief - - "-" 6 6 To drain, water tank or sump To drain, water tank or sump
Models, & 6 PS\UL Typical control trim materials for POG () applications ID Description Material () Dorot valve body* See Engineering data model (b) Self flushing strainer SST6 Pressure gauge SST Pressure relief pilot valve SST6 Check valve SST6 *Illustration below using " model () Petrochemical, Oil & Gas () Refer to material selection guidelines, Engineering Data - Valves & Control Trims (b) Basic Valve material options: Ductile Iron A-6 6--; Cast Steel WCB A-6; Cast Steel A- LCB; Austenitic Stainless Steel A-/CFM; Super Duplex ; Nickel-Aluminium-Bronze B- UNS C )-PS
Models, & 6 PS\UL Fire Protection Div. Valve dimensions Valve () () () 6 () () inch mm inch mm inch mm inch mm inch mm A 6 / 66 / 6 / / B / 6 / / / / 6 66 C / 6 6 / 6 / / 6 / D / / / / / 6 E / 6 / 6 / / 6. / F / 6 / / / 6 / 6 Approx. Weight Ibs kg Ibs kg Ibs kg Ibs kg Ibs kg * Approximate dimensions, shown for model -PS\UL C A F B E D
Models, & 6 PS\UL Fire Protection Div. Typical system layout Pressure reducing station layout including downstream pressure relief valve Fire pump station Dorot -PS\UL pressure relief valve Dorot -PR\UL pressure reducing valve Pump Isolation valve Strainer
Fire Protection Div. Models, & 6 PS\UL Ordering guide Model - SS - - - ANRF - PS\UL - Optional add-on LS Limit switch PI Pressure switch 6 6 Control function Material End connection standard Dutile Iron - ANRF ANSI # (RF or FF) Cast Steel CS ANRF ANSI # (RF or FF) SST6 SS V Grooved NAB NAB ISO6 ISO PN6 Optional add-on ISO ISO PN Indicator rod I xxx Other (specify) Size (inch) - - Technical data: Media up to C = F Elastomers suitable for extreme climates are available upon request. UL listed sizes: Model (Flanged): - Model (Threaded): - Lloyd s type-approved sizes: Model 6 (Flanged): - Model (Flanged): - Model (Threaded): - ABS fire test applicable to model 6 End connections: Flanged: ISO PN, ISO-PN6 & ISO-PN ANSI B6. Class, AS Tables D & E, JIS Additional options available upon request Grooved: Pressure rating: Up to bar / psi Minimum system pressure. bar / psi UL listed pressure setting range: - : up to psi Please specify in addition to the above: Control trim material other than standard (brass/copper) Required standards, certifications and approval * Please refer to Series Engineering Data and PS\UL IOM for hydraulic data and hydraulic graphs 6 Specification for engineers The valve shall consist of three major components: the body, cover and the diaphragm assembly. The diaphragm shall be the only moving part. The diaphragm forms a sealed control chamber in the upper portion of the valve, separating operating pressure from line pressure. Packing glands stuffing boxes and dynamic o-ring seals are not permitted and there shall be no shafts, discs, bearings or pistons operating the main valve. No hourglass-shaped disc retainers shall be permitted and no V-type, U-type or other slotted type disc guides shall be used. The valve shall contain a nylon reinforced rubber diaphragm, elastic & resilient through its entire surface without vulcanized radial discs and/or reinforcements. The diaphragm shall not be guided by any shafts or bearings and shall not be in close contact with other valve parts except for its sealing surface. Maintenance, disassembly and reassembly of all the valve s components shall be made possible on site and in-line, without the need to remove the valve from the line. The valve will be factory trimmed, tested and calibrated to a fixed relief pressure. Change of factory preset pressure setting can be done at all times, in-line with no special tools or system down time following simple IOM instructions. Standard material valves such as Ductile Iron (ASTM A-6 6--) and Cast Steel (WCB A-6) should be coated with high-built fusion-bonded epoxy (FBE) and a UV protective topcoat conforming to EN C & C high & very high corrosivity protection grades. Naval quality/very high corrosivity protection grade conforming to EN CM is available upon request. Other coating standards such as NORSOK or ANSI/NACE as well as coatings for special material valves such as austenitic Stainless Steel (CFM/ASTM A-6 ) and Nickel Aluminum Bronze (ASTM B-) can be supplied upon request. Dorot & Dorot companies worldwide reserve the right to make changes without notice including product specification and configuration, content, description(s), dimensions etc. The Information herein is subject to change without notice. Dorot shall not be held liable for any errors. All rights reserved. Copyright by Dorot. Dorot Control Valves www.dorot.com e-mail: fp@dorot.com Edition..