p 54, p 8, v 54, v 8 - imi hydronicthe valve’s inlet acts through the impulse pipe (2) to the top...

ENGINEERING ADVANTAGE

P 54, P 8, V 54, V 8

Pressure relief valve (P 54, P 8) and safety valve (V 54, V 8)

These valves ensure accurate absolute pressure control in a range of applications including heating and cooling systems, pressure maintaining 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 - P 54, P 8, V 54, V8

2

Special internal geometryAllows big pressure drop without noise.

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

Auxiliary springOpens the valve in case of diaphragm rupture.

Technical description

Application:Heating and cooling systems.For other applications consult manufacturer.

Function:Opens at increasing pressure at the inlet.

Dimensions:P 54, V 54: DN 25-50P 8, V 8: DN 65-125

Pressure class:PN 25

Max. differential pressure (ΔpV):16 bar

Temperature:Max. working temperature: 150°C Min. 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.


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Operating function

P 8The regulator consists of a valve (1), a diaphragm actuated actuator (3) and a pressure vessel (8). The fluid pressure at the valve’s inlet acts through the impulse pipe (2) to the top side of diaphragm (5), and attempts to open 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 close 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 opens until the new balance is reached. In case of a diaphragm rupture, the pressure of fluid on top side and compressed air on bottom side of diaphragm are equalized, and the auxiliary spring instantly fully opens the valve. The force of the auxiliary spring corresponds to a pressure of approx. 20 kPa.

V 8Function is the same as for P 8, only the force of the auxiliary spring is smaller. It corresponds to the pressure of approx. 5 kPa.

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

V 54Function is the same as for V 8, only the force of the auxiliary spring is smaller. It correspond to the pressure of approx. 5 kPa. This allows combining the valves effectively, see the explanation below.

Combination of pressure relief and safety valveIf pressure relief valve P 8 and safety valve V 8 are connected to the same pressure vessel, both valves will be normally closed.If pressure relief valve is forced to open, but the pressure at the inlet accidentally rises for any reason 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.

Combination of reducing and safety valveIf reducing valve R 8 and safety valve 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 valve R 8 and relief valve P 8 cannot 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.


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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:

Installation

Install the valve into a horizontal pipeline with actuator body below. The direction of flow is shown with an arrow on the valve body.Installation of a strainer upstream the pressure relief and safety valve is NOT allowed. For impulse and connection pipe use copper pipe Ø10x1.

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

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. 20 kPa higher than the desired pressure of regulated fluid.

[ ]


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Pressure reducing system with reducing valve and safety valve both connected to the common pressure vessel

Application example

P 54, V 54 – DN 25-50

P 54 (PN 25)

Article No DN D D1 L H H1 Kvs Kg

52 772-125 25 115 276 160 80 350 9 2252 772-132 32 140 276 180 95 365 17 2452 772-140 40 150 276 200 95 365 19 2852 772-150 50 165 276 230 105 375 32 35

V 54 (PN 25)


52 771-125 25 115 276 160 80 350 9 2252 771-132 32 140 276 180 95 365 17 2452 771-140 40 150 276 200 95 365 19 2852 771-150 50 165 276 230 105 375 32 35

→ = Flow direction

V 8

R 8

TPDM 310

L

ØD1

ØD

H

H1

Run and spill system of keeping constant pressure at one point of installation

Application example

TPDM 310

P 8

V 8


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P 8, V 8 – DN 65-125

P 8 (PN 25)


52 775-165 65 185 375 290 125 545 50 6852 775-180 80 200 375 310 135 555 80 7852 775-190 100 220 375 350 165 600 110 9852 775-191 125 250 375 400 175 610 120 106

V 8 (PN 25)


52 774-165 65 185 375 290 125 545 50 6852 774-180 80 200 375 310 135 555 80 7852 774-190 100 220 375 350 165 600 110 9852 774-191 125 250 375 400 175 610 120 106

→ = Flow direction

Pressure vessels

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

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.

L

ØD

H

H1

ØD1

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.

6-12-15 P 54, P 8, V 54, V 8 03.2011

p 54, p 8, v 54, v 8 - imi hydronicthe valve’s inlet acts through the impulse pipe (2) to the top...

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