ENGINEERING ADVANTAGE

R 54, R 8

Reducing valves

These pressure controllers (reducing valves) deliver accurate absolute pressure control in heating and cooling systems, water supply systems and industrial applications. A soft NBR diaphragm delivers a long lifetime.

Pressurisation & Water Quality Balancing & Control Thermostatic Control

STaTiC PreSSure ConTrollerS - R 54, R 8

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Special internal geometryAllows big pressure drop without noise.

Pneumatic springAllows adjustable set-point from 0 to 16 bar.

Auxiliary springCloses the valve in case of diaphragm rupture.

Technical description

Application:Heating and cooling systems.

Function:Closes at increasing pressure at the outlet.

Dimensions:R 54: DN 25-50R 8: DN 65-125

Pressure class:PN 25

Max. differential pressure (ΔpV):16 bar

Temperature:Max. working temperature: 150°CMin. working temperature: -10°C

Media:Water and neutral fluids, water-glycol mixtures. Other media on special request.

Material:Valve body: Ductile iron EN-GJS-400-15Valve seat: Stainless steelValve plug: Stainless steel with EPDM insertDiaphragm: NBR

Surface treatment:Spray painting

Marking:TA, DN, PN, material, Kvs and flow direction arrow.

Flanges:According to EN 1092-2:1997, type 21.

STaTiC PreSSure ConTrollerS - R 54, R 8

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Operating function

R 8The regulator consists of a valve (1), diaphragm actuated actuator (3) and a pressure vessel (8). The fluid pressure at valve’s outlet acts through the impulse pipe (2) to the top side of the diaphragm (5), and attempts to close the valve together with the force of the auxiliary spring (4).The pressure of compressed gas (9) in the pressure vessel acts through the connection pipe (6) to the bottom side of diaphragm, and attempts to open the valve. As long as the forces on the diaphragm are balanced, the valve’s plug stands still. If the fluid pressure increases, the valve closes until the new balance is reached.In case of diaphragm rupture, pressure of fluid on top side and compressed air on the bottom side of the diaphragm are equalized, and auxiliary spring instantly tightly closes the valve. The force of the auxiliary spring corresponds to the pressure of approx. 30 kPa for R 54 and 20 kPa for R 8.

R 54Function is the same as for R 8, only the pressure vessel is attached directly to the valve body, no connection pipe (6) is necessary.

Combination of reducing and safety valve If reducing valves R 54 / R 8 and safety valves V 54 / V 8 are connected to the same pressure vessel, reducing valve will be normally open, and safety valve tightly closed. If the reducing valve is forced to close completely, but the pressure at the outlet accidentally rises for any reasons by additional 15 kPa, the safety valve starts to open.Pressure difference between acting ranges of both valves depends on forces of auxiliary springs. This combination ensures the best possible accuracy and security of two jointly working valves. Caution: Reducing valves R 54 / R 8 and relief valves P 54 / P 8 can not be connected to the same pressure vessel, because the forces of both springs are the same. In such case the relief valve would remain constantly open.

Sizing

It is recommended to choose the flow speed of water within 0,5 to 2 m/s. Optimal speed is approx. 1 m/s. Control the pressure drop in valve by formula:

1

2

4

3

5

12

11

10

9

8

76

[ ]

STaTiC PreSSure ConTrollerS - R 54, R 8

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Installation

Install the valve into a horizontal pipeline with the actuator body below. The direction of flow is shown with an arrow on the valve body.Installation of a strainer upstream the valve is recommended.At the first filling, vent actuator body a couple of times by vent screw (12). For impulse pipe (2) and connection pipe (6) use copper pipe Ø10x1.

Application example

Pressure vessel installation – TPx 180The pressure vessel has a spherical form and mounted directly on the valve body.The vessel type TP 180 is provided with a filling valve (10) and one connection (7) to the valve.The vessel type TPM 180 is additionally provided with a manometer connection (11).Type TPD 180 is provided with one connection for the valve and a connecting pipe for another valve, and type TPDM 180 has a manometer connection in addition. Prior to mounting of the connecting pipe and manometer, check the sealing surfaces and clean them if necessary. Install very carefully and check tightness with soap or spray. Make sure to use only original rubber seals. Never use hemp or teflon tape. Install the vessel away from hot surfaces.

Pressure vessel installation – TPx 310The pressure vessel has a spherical form with two hooks for mounting on the wall. The vessel type TP 310 is provided with a filling valve (10) and one connection (7) for the connecting pipe. The vessel type TPM 310 is additionally provided with a manometer connection (11). Type TPD 310 is provided with two connections (7) for the connecting pipe, and type TPDM 310 has a manometer connection in addition. Solder the pipe that connects pressure vessel with the valves (copper Ø10mm) to the connection parts.Prior to mounting of the connecting pipe and manometer, check the sealing surfaces and clean them if necessary. Install very carefully and check tightness with soap or spray. Make sure to use only original rubber seals. Never use hemp or teflon tape. Install the vessel away from hot surfaces.

Pressure adjustmentFill the pressure vessel with compressed air or nitrogen. The pressure in the vessel must be by approx. 30 kPa for R 54 and 20 kPa for R 8 higher then the desired pressure of regulated fluid.

V 8

R 8

TPDM 310

Normal pipe fittingsTry to avoid mounting taps and pumps immediately before the valve.

STaTiC PreSSure ConTrollerS - R 54, R 8

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R 54

PN 25

Article No DN D D1 L H H1 Kvs Kg

52 770-125 25 115 276 160 80 350 9 2252 770-132 32 140 276 180 95 365 17 2452 770-140 40 150 276 200 95 365 19 2852 770-150 50 165 276 230 105 375 32 35

R 8

PN 25

Article No DN D D1 L H H1 Kvs Kg

52 773-165 65 185 310 290 125 545 50 6852 773-180 80 200 310 310 135 555 80 7852 773-190 100 220 310 350 165 600 110 9852 773-191 125 250 310 400 175 610 120 106

L

ØD

H

H1

ØD1

L

ØD

H

H1

ØD1

STaTiC PreSSure ConTrollerS - R 54, R 8

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Pressure vessels

For R 54

TPx 180

Article No Type Ø

52 790-001 TP 180 18052 790-002 TPM 180 18052 790-003 TPD 180 18052 790-004 TPDM 180 180

For R 8

TPx 310

Article No Type Ø

52 790-005 TP 310 31052 790-006 TPM 310 31052 790-007 TPD 310 31052 790-008 TPDM 310 310

DescriptionTP is provided with a filling valve and one connection for the connecting pipe.TPM the same as TP and a manometer connection.TPD is provided with two connections for the connecting pipe.TPDM the same as TPD and a manometer connection.

TPDMTPD

TPMTP

TPDMTPD

TPMTP

The products, texts, photographs, graphics and diagrams in this document may be subject to alteration by TA Hydronics without prior notice or reasons being given. For the most up to date information about our products and specifications, please visit www.tahydronics.com.

6-12-11 R 54, R 8 03.2011