Product Overview

The Spirax Sarco BTD52L thermodynamic steam trap is manufactured from 316L stainless steel specifically for mains drainage applications in clean steam systems. This product fully complies with the requirements of the EU Pressure Equipment Directive 2014/68/EU.

Product Features

• 316L stainless steel construction for excellent corrosion resistance
• Designed specifically for clean steam system drainage
• Multiple connection options to suit different pipeline systems
• Available with EN 10204 3.1 certification
• BTD52L Food+ model complies with EC1935:2004 Food Contact Materials regulation

Sizes and Pipe Connections

BTD52L offers various connection types to accommodate different installation requirements:

Connection Type	Size
Screwed	¼", ⅜", ½" BSP or NPT
Tube Ends	½" O/D × 16 swg (0.065") wall thickness
DIN 11850 (Series 1)	12mm O/D × 1.0mm wall thickness (DN10), 18mm O/D × 1.0mm wall thickness (DN15)
ISO 1127 (Series 1)	17.2mm O/D × 1.6mm wall thickness (DN10), 21.3mm O/D × 1.6mm wall thickness (DN15)
Sanitary Clamp	½" Sanitary clamp compatible connections (DN15)

Optional Extras

• Insulating Cover (optional): Made of aluminum, protects the trap from excessive heat loss when subjected to low ambient temperature, wind, rain, etc., thereby extending service life.

Pressure / Temperature Limits

Parameter	Value
Body Design Condition	PN16
PMA Maximum Allowable Pressure	16 bar g @ 50°C
TMA Maximum Allowable Temperature	450°C @ 8 bar g
Minimum Allowable Temperature	0°C
PMO Maximum Operating Pressure (saturated steam)	10 bar g @ 220°C
TMO Maximum Operating Temperature	450°C @ 8 bar g
Minimum Operating Temperature	0°C
Note	For lower operating temperatures consult Spirax Sarco
PMOB Maximum Operating Back Pressure	Not exceeding 80% of upstream pressure
Minimum Operating Differential Pressure	0.25 bar g
Cold Hydraulic Test Pressure	24 bar g

Notice

• The product must not be used in this region (outside the pressure/temperature limit curve)
• For lower operating temperatures consult Spirax Sarco

Materials

No.	Part Name	Material
1	Body	Austenitic stainless steel AISI 316L
2	Cap	Austenitic stainless steel AISI 316L
3	Disc	Austenitic stainless steel AISI 316L
4	Insulating cover (optional)	Aluminium

Dimensions and Weights

Dimensions/weights (approximate) in mm (dimensions) and kg (weights)

Connection Type	A	A1	A2	B	C	D	E	F	G	Weight (kg)
Screwed BSP/NPT	65	-	65	36	53	15	40	38	38	0.45
Tube Ends	-	123	-	36	51	14	40	37	38	0.45
Sanitary Clamp	65	-	65	36	53	15	40	38	38	0.55

Capacities

Selection Advice

• Capacity is related to differential pressure, refer to the capacity curves for selection
• Minimum operating differential pressure: 0.25 bar g
• Maximum operating back pressure should not exceed 80% of upstream pressure

Installation and Maintenance

Installation Requirements

• The trap should preferably be installed in the horizontal plane, with a small drop leg preceding it
• For freeze proof installation, or where horizontal fitting is not possible, the BTD52L may be installed vertically, but service life may be affected
• Suitable isolation valves must be installed to allow for safe maintenance and trap replacement
• When the trap discharges into a closed return system, a non-return valve should be fitted downstream to prevent return flow

Safety Information

For full details see the Installation and Maintenance Instructions (IM-P181-03) supplied with the product.

Spare Parts

Available Spares	Item Number
Disc	3
Insulating cover	4

How to Order Spares

Always order spares by using the description given in the column headed 'Available spares' and state the size and type of trap.

Example: 1 - Disc for a ½" BSP Spirax Sarco BTD52L thermodynamic steam trap.

Recommended Tightening Torques

Item No.	Size (mm)	Tightening Torque (N·m)
2 (Cap)	36 A/F	115 - 130

Warning

When torquing or untorquing the cap, some support should be given to the body of the trap to prevent over stressing and/or distortion of the end connections and system pipework.

How to Order

Example: 1 off Spirax Sarco BTD52L thermodynamic steam trap in 316L stainless steel with tube ends 17.2 mm O/D × 1.6 mm wall thickness (ISO 1127, Series 1).

Disposal

The product is recyclable. No ecological hazard is anticipated with the disposal of this product, providing due care is taken.

Certification

This product is available with certification to EN 10204 3.1. Note: All certification/inspection requirements must be stated at the time of order placement.

The BTD52L Food+ is available with an EC1935:2004 Declaration of Compliance. Note: All certification/inspection requirements must be stated at the time of order placement.