Spirax Sarco HM Series Manuale utente

IM-S03-11 CMGT Issue 5 1

HM and HM34 Inverted Bucket Steam Traps

HM Series

HM34 Series

1. Safety information

2. General product information

3. Installation

4. Commissioning

5. Operation

6. Maintenance

7. Spare parts

Printed in GB

0670350/5

HM and HM34

Inverted Bucket Steam Traps

Installation and Maintenance Instructions

IM-S03-11

CMGT Issue 5

IM-S03-11 CMGT Issue 5

HM and HM34 Inverted Bucket Steam Traps

IM-S03-11 CMGT Issue 5 3

HM and HM34 Inverted Bucket Steam Traps

Safe operation of this product can only be guaranteed if it is properly installed, commissioned,

used and maintained by qualified personnel (see Section 1.11 ) in compliance with the operating

instructions. General installation and safety instructions for pipeline and plant construction, as

well as the proper use of tools and safety equipment must also be complied with.

1.1 Intended use

Referring to the Installation and Maintenance Instructions, name-plate and Technical Information

Sheet, check that the product is suitable for the intended use / application.

The product listed below complies with the requirements of the Pressure Equipment Directive

2014/68/EU and carries the mark when so required.

The product falls within the following Pressure Equipment Directive categories:

Product Group 2

Gases

Group 2

Liquids

HM and HM34 SEP SEP

i) The product has been specifically designed for use on steam, air or water /condensate which

are in Group 2 of the above mentioned Pressure Equipment Directive. The products’ use on

other fluids may be possible but, if this is contemplated, Spirax Sarco should be contacted to

confirm the suitability of the product for the application being considered.

ii) Check material suitability, pressure and temperature and their maximum and minimum values.

If the maximum operating limits of the product are lower than those of the system in which it

is being fitted, or if malfunction of the product could result in a dangerous overpressure or

overtemperature occurrence, ensure a safety device is included in the system to prevent such

over-limit situations.

iii) Determine the correct installation situation and direction of fluid flow.

iv) Spirax Sarco products are not intended to withstand external stresses that may be induced by

any system to which they are fitted. It is the responsibility of the installer to consider these

stresses and take adequate precautions to minimise them.

v) Remove protection covers from all connections before installation.

1.2 Access

Ensure safe access and if necessary a safe working platform (suitably guarded) before attempting

to work on the product. Arrange suitable lifting gear if required.

1.3 Lighting

Ensure adequate lighting, particularly where detailed or intricate work is required.

1.4 Hazardous liquids or gases in the pipeline

Consider what is in the pipeline or what may have been in the pipeline at some previous time.

Consider: flammable materials, substances hazardous to health, extremes of temperature.

1. Safety information

IM-S03-11 CMGT Issue 5

HM and HM34 Inverted Bucket Steam Traps

1.5 Hazardous environment around the product

Consider: explosion risk areas, lack of oxygen (e.g. tanks, pits), dangerous gases, extremes of

temperature, hot surfaces, fire hazard (e.g. during welding), excessive noise, moving machinery.

1.6 The system

Consider the effect on the complete system of the work proposed. Will any proposed action (e.g.

closing isolation valves, electrical isolation) put any other part of the system or any personnel at

risk?

Dangers might include isolation of vents or protective devices or the rendering ineffective of

controls or alarms. Ensure isolation valves are turned on and off in a gradual way to avoid system

shocks.

1.7 Pressure systems

Ensure that any pressure is isolated and safely vented to atmospheric pressure.

Consider double isolation (double block and bleed) and the locking or labelling of closed valves.

Do not assume that the system has depressurised even when the pressure gauge indicates zero.

1.8 Temperature

Allow time for temperature to normalise after isolation to avoid danger of burns.

1.9 Tools and consumables

Before starting work ensure that you have suitable tools and /or consumables available. Use only

genuine Spirax Sarco replacement parts.

1.10 Protective clothing

Consider whether you and/or others in the vicinity require any protective clothing to protect against

the hazards of, for example, chemicals, high / low temperature, radiation, noise, falling objects,

and dangers to eyes and face.

1.11 Permits to work

All work must be carried out or be supervised by a suitably competent person.

Installation and operating personnel should be trained in the correct use of the product according

to the Installation and Maintenance Instructions.

Where a formal ‘permit to work’ system is in force it must be complied with. Where there is no

such system, it is recommended that a responsible person should know what work is going on

and, where necessary, arrange to have an assistant whose primary responsibility is safety.

Post ‘warning notices’ if necessary.

1.12 Handling

Manual handling of large and/or heavy products may present a risk of injury. Lifting, pushing,

pulling, carrying or supporting a load by bodily force can cause injury particularly to the back.

You are advised to assess the risks taking into account the task, the individual, the load and the

working environment and use the appropriate handling method depending on the circumstances

of the work being done.

IM-S03-11 CMGT Issue 5 5

HM and HM34 Inverted Bucket Steam Traps

1.13 Residual hazards

In normal use the external surface of the product may be very hot. If used at the maximum permitted

operating conditions the surface temperature of some products

may reach temperatures in excess of 425 °C (797 °F).

Many products are not self-draining. Take due care when dismantling or removing the product from

an installation (refer to ‘Maintenance instructions’).

1.14 Freezing

Provision must be made to protect products which are not self-draining against frost damage in

environments where they may be exposed to temperatures below freezing point.

1.15 Disposal

Unless otherwise stated in the Installation and Maintenance Instructions, this product is recyclable

and no ecological hazard is anticipated with its disposal providing due care is taken.

1.16 Returning products

Customers and stockists are reminded that under EC Health, Safety and Environment Law, when

returning products to Spirax Sarco they must provide information on any hazards and the

precautions to be taken due to contamination residues or mechanical damage which may present

a health, safety or environmental risk. This information must be provided in writing including Health

and Safety data sheets relating to any substances identified as hazardous or potentially hazardous.

1.17 Working safely with cast iron products on steam

Cast iron products are commonly found on steam and condensate

systems. If installed correctly using good steam engineering

practices, it is perfectly safe.

However, because of its mechanical properties, it is less forgiving

compared to other materials such as SG iron or carbon steel.

The following are the good engineering practices required to

prevent waterhammer and ensure safe working conditions on

a steam system.

Safe Handling

Cast Iron is a brittle material. If the product is dropped during

installation and there is any risk of damage the product should

not be used unless it is fully inspected and pressure tested by the

manufacturer.

IM-S03-11 CMGT Issue 5

HM and HM34 Inverted Bucket Steam Traps

Prevention of water hammer

Steam trapping on steam mains:

Steam Mains - Do's and Don'ts:

Steam Steam

Flow Flow

30 - 50 metre intervals

Gradient 1:100

Trap set

Condensate

Steam

IM-S03-11 CMGT Issue 5 7

HM and HM34 Inverted Bucket Steam Traps

Prevention of tensile stressing

Pipe misalignment:

Installing products or re-assembling after maintenance:

Thermal expansion:

Do not over tighten.

Use correct torque gures.

4 2

Flange bolts should be gradually tightened across

diameters to ensure even load and alignment.

Guides

Limit

rods

Limit rods

Fixing point

Medium

distance

Small lateral

movement

Small lateral

movement

Large lateral

movement

Large lateral

movement

Short

distance Fixing point

Axial

movement

Axial movement

Guides

IM-S03-11 CMGT Issue 5

HM and HM34 Inverted Bucket Steam Traps

2.1 Description

The Spirax Sarco HM Series inverted bucket steam trap is manufactured in cast iron and has an integral

strainer as standard. It is designed to be installed in horizontal pipework and will operate on steam pressures

up to 14 bar g (203 psi g).

The Spirax Sarco HM34 series inverted bucket trap is similar to the HM Series but is manufactured in carbon

steel and will operate on steam pressures up to 32 bar g (464 psi g).

Note: For further information see the following Technical Information Sheets, TI-S03-02 for the HM Series

and TI-P072-01 for the HM34 Series, which gives full details of:- Materials, sizes and pipe connections,

dimensions, weights, operating ranges and capacities.

Fig. 1 HM00 (½") and HM10 (¾")

Fig. 2 HM12 (1")

Fig. 3 HM34 (½" and ¾")

Fig. 4 HM34 (1")

2. General product information

IM-S03-11 CMGT Issue 5 9

HM and HM34 Inverted Bucket Steam Traps

2.2 Sizes and pipe connections

HM Series

½" (HM00), ¾" (HM10) and 1" (HM12) screwed BSP or NPT.

DN15 (HM003), DN20 (HM103) and DN25 (HM123) standard flange BS 4504 and DIN PN16.

HM34 Series

½", ¾" and 1" screwed BSP or NPT and socket weld ends BS 3799 Class 3000

DN15, DN20 and DN25 standard flange BS 4504 PN40.

Flanges also available ANSI 150 and ANSI 300.

2.3 Materials

Trap HM Series HM34 Series

Cover Cast iron Cast steel

Body

½" and ¾"Cast iron Forged steel

1" Cast iron Cast steel

Internals Stainless steel Stainless steel

Note: For further information on materials see the following Technical Information Sheets: TI-S03-02 for the

HM Series and TI-P072-01 for the HM34 Series.

IM-S03-11 CMGT Issue 5

HM and HM34 Inverted Bucket Steam Traps

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Temperature °C

HM Series

Pressure bar g

Steam saturation curve

The product must not be used in this region.

*PMO Maximum operating pressure recommended for saturated steam 14 bar g (203 bar g).

∆PMX - Maximum differential pressure

Size

Maximum differential pressure bar

48.5 10 12.5 14

Screwed

½" HM00/8 HM00/7 HM00/6 — —

¾" HM10/10 HM10/8 —HM10/7 —

1" HM12/12 HM12/10 — — HM12/7

Flanged

DN15 HM003/8 HM003/7 HM003/6 — —

DN20 HM103/10 HM103/8 —HM103/7 —

DN25 HM123/12 HM123/10 — — HM123/7

Note: The pressure limit of the flange type should be greater than the pressure limit of the internal mechanism

selected.

2.4 Limiting conditions

HM HM34

Maximum body designed conditions PN16 PN40

PMA Maximum allowable pressure 16 bar g (232 psi g) 40 bar g (580 psi g)

TMA Maximum allowable temperature 300 °C (572 °F) 300 °C (572 °F)

PMO Maximum operating pressure 16 bar g (232 psi g) 40 bar g (580 psi g)

TMO Maximum operating temperature 300 °C (572 °F) 300 °C (572 °F)

Designed for a maximum cold hydraulic test pressure of: 24 bar g (348 psi g) 60 bar g (870 psi g)

2.5 Operating range

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