B08-RFQ-Atch 6_7.11 O&M manual_Pressure Reducer Valve & Pressure Relief valves.pdf

W912GB-16-C-0039

European Infrastructure

Consolidation (EIC) projects

Eiffage Infraestructuras

CIF: A-41 441 122

Pol Ind. Ctra. de La Isla - C/ Río Viejo 3 41703 Dos Hermanas (Sevila) Tel.: +34 954 610 400 – Fax: +34 954 610 112 marco.pipino.ext@eiffage.com www.infraestructuras.eiffage.es

UTILITIES MOD

3.1 – PRESSURE REDUCER VALVE

mailto:marco.pipino.ext@eiffage.com

Dorot Management Control Valves Ltd

E-mail: FP@dorot.com www.dorot.com

30-X-PR\UL

mailto:FP@dorot.com

Edition: 3/17

This document specifies the operating concept of Dorot Pressure Reducing

Valve model 30-X-PR\UL (X refers to valve size in Inch), UL listed when trimmed per the following technical data sheet

Please review the safety instructions at the end of this document prior to commissioning the valve for use

VALVE MODEL 30-X-PR\UL

General description

The 30-X-PR\UL model automatic control valve is designed to reduce upstream pressure to a steady, preset downstream pressure regardless of flow or pressure fluctuations.

The valve is hydraulically-operated, pilot controlled, diaphragm-activated resilient disk globe type.

When water flows through the valve, the valve modulates automatically to generate the pressure loss that is needed to maintain the required downstream pressure Should downstream pressure exceed the preset value, the valve closes drip tight.

The downstream set-point is determined using one adjusting bolt on the pilot valve.

Operating range

- Minimum system pressure: 1.5 bar \ 22 psi

- Maximal upstream pressure: 25 bar \ 375 psi

- Minimal adjustable downstream pressure: 2 bar \ 30 psi

- Maximal adjustable downstream pressure: 11.5 bar \ 165 psi

Note:

- The minimal head loss across the valve reaches 1.2 bar (18 psi) at a maximal flow velocity of 5.5 m/s (18 ft/s).

- The valve maintains the preset downstream pressure at the adjusted value, unless upstream pressure drops below the designated downstream pressure +

1.2 bar (18 psi).

- Downstream pressure may exceed the adjusted value by 0.5 bar (7 psi) when the flow through the valve is stopped gradually.

- The minimal upstream pressure shall be at least 1.7 bar (25 psi) for setting purposes with the flow at ½ the maximal flow.

Maximal flow rates:

2” (50mm) 38 [m3/hr] 170 [gpm]

3” (80mm) 100 [m3/hr] 440 [gpm]

4” (100mm) 155 [m3/hr] 680 [gpm]

6” (150mm) 350 [m3/hr] 1550 [gpm]

General description

Available end connections

- Flanged & Grooved: 2” – 6”.

Available body & cover and trim materials

Body & Cover Valve Fitting Valve Tubing Diaphragm

Ductile Iron A536* Brass* Copper* Neoprene*

CF8M/ASTM A-316 SST316 Cu-Ni 90/10 NR

Ni-Al-Bronze ASTM B148 gr.C95800 SST304 ASTM A 351 SST316 EPDM

Cast Steel ASTM A 216 WCB Super Duplex 2507 Super Duplex 2507 NBR

Aluminum-Bronze

MONEL®

* Standard material

Installation

All installation rules specified in NFPA 13, NFPA 14 and NFPA 25 standards should be followed when the valve is installed. These valves are set to provide downstream pressures and flows, and are to be tested after installation in accordance with NFPA 13 or NFPA 14 or both NFPA 13 and 14, whichever is applicable.

The pipeline should be flushed from any debris and other material before installing the valve.

Horizontal assembly is recommended for maintenance purpose but vertical assembly is allowed, in case the system design demands it.

Flow direction must match the engraved direction arrow on the valve body.

Sufficient space around the valve is to be provided for easy maintenance (see dimensions table).

Isolating valves (gate type, butterfly type or equivalent - not supplied), should be assembled upstream and downstream of the Pressure Reducing valve.

A drain valve (not supplied), at least 1” (25mm) in size, should be installed on the pipeline, downstream of the Pressure Reducing valve.

Valve assembly configuration- General drawing – not to scale

Fig. 1- General scheme

Main components:

a. CXPR pressure reducing pilot a1. Adjusting bolt.

a2. Needle bolt.

b. Self-flushing, inline filter.

c. Upstream pressure gauge (optional).

d. Downstream pressure gauge.

e. Air release nut.

Fig. 2- System P&ID

Integral system components

Item # Description v Hydraulic valve a CXPR pressure reducing pilot b Self-flushing filter d Pressure gauge f 1/2" tube l Indicator Rod

Optional system components

Item # Description c Pressure gauge

Water v b a l c

PG

d PG

Items inside dotted lines are within Dorot’s scope

Start up and adjustment of the Pressure Reducing valve (refer to figure 1 – General scheme)

The procedures below are additional to the basic inspection, testing and maintenance procedures as specified in NFPA 25 standard. These valves are to be tested periodically after installation in accordance with NFPA 25.

5.1. Open needle bolt [a2] by 1 turn and lock it with the locking nut.

5.2. Completely open the adjusting bolt [a1] on the pilot valve [a] counter-clockwise.

5.3. Slightly open the Pressure Reducing valve's downstream drain valve to a throttled position.

5.4. Open the manual isolating valve upstream of the control valve. The Pressure

Reducing valve will open and water flow will be detected, since the control chamber of the main valve is still drained.

5.5. Wait until the Pressure Reducing valve closes. Open the air release nut [e] and close it when no air bubbles emerge from the control chamber.

5.6. Adjust downstream pressure by the adjusting bolt [a1]:

5.6.1. Open the locking nut.

5.6.2. Turn the adjusting bolt clockwise to increase downstream pressure until it reaches the required set-point value.

5.6.3. In case the downstream pressure is too high, turn the adjusting bolt counter-clockwise to reduce downstream pressure.

5.6.4. When the required pressure has been reached, lock the adjusting bolt by tightening the locking nut.

5.7. Check the valve’s response by opening and then partially-closing the drain valve.

5.8. Adjust response time using the needle bolt [a2]. Opening the bolt accelerates valve response. Do not close the needle bolt [a2] all the way as it will prevent the Pressure Reducing valve from closing.

5.9. Close the downstream drain valve. Fully open the downstream isolating valve.

5.10. The Pressure Reducing valve is now ready for operation.

Maintenance

6.1. Inspecting the downstream pressure

6.1.1. Open the drain valve, set it to larger and smaller flows, examine the PR valve’s response by inspecting the pressure as indicated on the downstream pressure gauge [d].

6.1.2. Close the drain valve (the downstream pressure will rise by approximately

0.5 bar).

6.2. Inspecting of self- flushing filter

6.2.1. Close both upstream and downstream isolating valves.

6.2.2. Extract the screen element of the self-flushing filter [b] as described in the drawing:

6.2.3. Clean and then reassemble the screen element into its housing.

6.2.4. Open the isolating valves.

6.2.5. Open the drain valve, set it to larger and smaller flows, inspect the Pressure

Reducing valve’s response by registering pressures as indicated on the downstream pressure gauge [d].

6.2.6. Close the drain valve.

Dimensions

Hydraulic data

Flow rate when upstream pressure is below downstream pressure setting

Valve 30-2-PR 30-3-PR 30-4-PR 30-6-PR

L(mm) 230 310 350 480

L(inch) 91/16 123/16 133/4 187/8

LL(mm) 224 304 344 474

LL(inch) 813/16 1115/16 139/16 1811/16

H(mm) 200 341 368 506

H(inch) 77/8 137/8 141/2 1915/16

HH(mm) 236 402 428 558

HH(inch) 95/16 1513/16 167/8 2115/16

Width space (mm)

For easy maintenance

(inch)

560 600 620 685

22 23 25 27

Hydraulic data

Safety Instructions:

PLEASE NOTE

- Before using this product, read and understand the instructions.

- All Procedures must be carried out by qualified personnel.

- Make sure that all applicable safety precautions have been taken.

- Read this manual along with all the provided data.

- Save these instructions for future reference.

Before disassembly of any accessory or component:

- All internal pressures must be relieved and all liquid drained from the system in accordance with all applicable procedures.

- Pressure must be 0 (zero) bar/psi.

Before Installation:

- Flush the lines upstream of the pressure reducing valve. If anti-corrosion, anti-freeze or any other type of additives are used, please consult the documentation or Dorot FP division concerning potential damage to the valve and its components.

- Remove all external and internal packaging along with any temporary protective material.

- Carefully inspect the valve to ensure that no damage has occurred in transit or during subsequent handling.

- Ensure that the valve is the correct type and size and that the identification markings show that the material and pressure/temperature rating is suitable for the required service conditions.

- Read the installation instructions carefully and follow them.

- Ensure that the valve is lifted safely into position without damaging the valve.

- Ensure that the valve is installed so that it can be safely operated and maintained without putting any people at risk.

- Make sure that a firm footing is provided for the person installing the valve with adequate space around the valve to meet operating and maintenance requirements.

- Ensure that there is adequate lighting for valve installation.

- The valve can be installed in any position, but flow direction should match the engraved arrow on the bonnet.

Failure to follow the instructions set forth in this publication could result in property damage, personal injury, or death from hazards that may be associated with this type of equipment.

Dorot Control Valves Ltd

E-mail: fp@dorot.com www.dorot.com

30-X-PS\UL

Pressure Relief valve mailto:fp@dorot.com http://www.dorot.com/

Edition: 3/2017

This document specifies the operating concept of Dorot Pressure Relief valve model 30-X-PS\UL (X refers to valve size in Inch), UL listed when trimmed per the following technical data sheet

Please review the safety instructions at the end of this document prior to commissioning the valve for use

General description of the valve

This automatic control valve was designed to relieve water from the discharge side of pump or pumping station that supplies a fire-extinguishing network with varying flow and pressure demands.

When the pressure in the valve location exceeds the preset value, the valve opens, increasing the pumped flow rate and thus reducing the pressure.

The valve is hydraulically-operated, pilot-controlled, diaphragm-activated resilient-disk globe type.

Requested inlet pressure is adjustable to pressure ranges as specified in item 2 below.

When a flow exists through the valve, it modulates automatically to generate the pressure loss that is needed to maintain the requested inlet pressure.

In case the pressure at the valve site is below the preset value, the valve closes drip tight.

Pressure setting is done manually using one adjusting screw in the pilot valve.

Operating range

Minimal inlet pressure 20mwc 30psi Maximal inlet pressure (3”, 4”, 6”) 240mwc 350psi Maximal inlet pressure (2”) 140mwc 205psi Note: it is assumed that outlet pressure of the valve is zero to 5m (8psi)

Maximal flow rates:

2” (50mm) valve 57m3/h 250gpm 3” (80mm) valve 115m3/h 500gpm 4” (100mm) valve 230m3/h 1000gpm 6” (150mm) valve 570m3/h 2500gpm

Installation

All installation directives specified in NFPA 13 and NFPA 14 standards should be followed when the valve is installed.

- The pipeline should be flushed from all debris and potential obstacles before installing the valve.

- Horizontal assembly is recommended for maintenance purpose, but vertical assembly is allowed, in case the system design demands it.

- Flow direction must match the engraved direction arrow on the valve body.

- Provide sufficient space around the valve for easy maintenance (see dimensions table).

- A manually operated isolating valve (not supplied) - gate or butterfly type, should be assembled upstream the PS-UL valve.

- The outlet of the valve should be connected to the pump suction or to a suitable drain point. The pipe size should be larger than the valve size in order to prevent hydraulic resistance to the valve flow.

Edition: 3/2017

Main components:

a. CXPS Pilot valve a1 Adjusting bolt a2. Needle bolt

b. Check valve

c. Air release nut

d. Control pressure gauge

e. Self-flushing, inline filter

f. ID tag

Valve assembly configuration- General unscaled drawing

Control scheme of the valve (not to scale)

The procedures below are in addition to the basic inspection, testing and maintenance procedures as specified in NFPA 25 standard

Upstream isolating valve

PS-UL valve

Discharge main

Fire Pump Relief Valve a a1 a2 b d c f e

Edition: 3/2017

Start up and adjustment of the PS valve

(refer to the “control system” drawing in the previous page)

1.1. Tighten the adjustment bolt [a1] of pilot [a]. Set Needle bolt [a2] to 1 opening turn and lock it using its lock nut.

1.2. Start the pump and open the manual isolating valve upstream the PS-UL valve.

1.3. The valve will open and water flow will be detected, since the control chamber of the main valve is still drained.

1.4. Wait until the PS-UL valve closes. Open the air release nut [c], and close it when air bubbles no longer emerge from the control chamber. Apply hand force only.

1.5. Turn the adjusting bolt [a1] slowly counter-clockwise until the pressure in the pipeline drops to the required value.

1.6. The valve is now ready for automatic operation.

Maintenance

Inlet pressure inspection:

Operate the pump at zero demand in the network. The pressure should not exceed the preset value.

Self- flushing filter Inspection (for valve sizes 3” and larger)

1. Close the upstream isolating valve.

2. Extract the screen element of the filter [e] as described in the drawing.

3. Clean and reassemble the screen element into its housing.

4. Open the Isolating valve.

Valve body

Filtration screen element

Operating principle

Low pipeline pressure-Valve closed High pipeline pressure- Valve opens

Hydraulic performance

Relief flow generated by pipeline pressure, fully-open valve, zero outlet pressure.

Continued:

10 5 6 7 8 100432 200

Flow Rate wmc 2" 3" 4" 6"

300 400 500

20010050 300 400 600 800 1000 1500 2000 m3/h gpm80 psi

H e a d l o s s

2. Dimensions of PS valves

Valve 30-2-PS 30-3-PS 30-4-PS 30-6-PS

L(mm) 230 310 350 480

L(inch) 91/16 123/16 133/4 187/8

LL(mm) 224 304 344 474

LL(inch) 813/16 1115/16 139/16 1811/16

H(mm) 200 341 368 506

H(inch) 77/8 137/8 141/2 1915/16

HH(mm) 236 402 428 558

HH(inch) 95/16 1513/16 167/8 2115/16

Width inc. space (mm) for easy maintenance (inch) 560 600 620 685

22 23 25 27