Spirax Sarco - Catalogo Agosto 2017

Steam traps

Fixed temperature discharge

ISO 9001

TI-P670-02

ST Issue 2

Cert. No. LRQ 9910872

Bydrain

Frost Protection Liquid Expansion Trap

Description

The Spirax Sarco bydrain frost protection liquid expansion trap is

made of stainless steel. It has been specifically designed for protecting

water systems from frost damage. This fixed temperature discharge

trap continuously monitors the water temperature in the pipes; the

trap is firmly closed at 7°C, but as the temperature of the water cools

to 2°C the trap opens, discharging any water in the pipe.

This product fully complies with the requirements of the European

Pressure Equipment Directive 97/23/EC.

Certification

This product is available with certification to EN 10204 3.1.B.

Note: All certification/inspection requirements must be stated at

the time of order placement.

Sizes and pipe connections

1⁄2" and 3⁄4" screwed BSP or NPT

Standards

Limiting conditions

Body design conditions

PMA - Maximum allowable

TMA - Maximum allowable

PMO - Maximum operating

TMO - Maximum operating

Minimum operating pressure

PN50, Class 300 to ANSI B 16.34

pressure

temperature

pressure

temperature

70°C

for satisfactory operation is 0.1 bar g

41.4 bar g

450°C

10 bar g

DPMX - The backpressure for correct operation must not exceed

90% of the upstream pressure.

Designed for a maximum cold hydraulic test pressure of 62 bar g

Note: The trap seat is completely open at a water circuit temperature

of 2°C and closed at 7°C.

Materials

No. Part

1 Body

2 Thermostat

Valve head

Internal parts

Material

Stainless steel

Brass

PTFE

Stainless steel

AISI 316L

Capacities

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Dimensions / weights (approximate) in mm and kg

Size

1⁄2"

3⁄4"

Connections

BSP, NPT

42.4

110

115

Weight

0.65

0.70

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Differential pressure bar (x 100 = kPa)

Safety information, installation and maintenance

For full details see the Installation and Maintenance Instructions

(IM-P670-01) supplied with the product.

How to order

Example: 1 off Spirax Sarco 1⁄2" bydrain frost protection liquid

expansion trap with screwed NPT end connections.

Local regulations may restrict the use of this product to below the conditions quoted.

In the interests of development and improvement of the product, we reserve the right to change the specification.