Honeywell SG162D Product specification sheet

EN0H-1305GE23 R0807 • Subject to change

SG162D

Safety group with pressure reducing valve for pressurised hot water storage units up to 200 litres

Product specification sheet

6.

Construction

The safety group comprises:

•Housing

•Shutoff valve

•Check valve with test plug

•Approved safety valve

•Tundish and trim plate

•Chrome-plated connection pipes

•Pressure reducing valve

Materials

•Chrome-plated hot-pressed brass housing

•High-quality synthetic material check valves

•High quality synthetic material test plug

•Chrome-plated hot-pressed brass safety valve housing

•High quality white synthetic material tundish and trim plate

•Chrome-plated brass connection pipework

•Chrome plated brass pressure reducing valve housing

Application

Safety groups of this type are controls to DIN 4753 Part 1 and DIN 1988 for the protection of pressurised hot water storage units with capacities up to 200 litres.

They are composite assemblies which integrate in one unit all necessary safety components, including check valve, shutoff valve, test point and diaphragm-type safety valve.

The safety valve protects the downstream cylinder, pressure vessel etc. by automatically opening when excess pressure occurs. The check valve prevents back pressure, backflow and back syphonage of water from the hot water unit.

In addition, a balanced-seat pressure reducing valve is fitted on the inlet and this reduces the pressure from the inlet supply to the pressure required for the system. It also prevents uncontrolled dripping from the safety valve when the inlet pressure fluctuates.

Special Features

•Check valve is DVGW approved

•Safety valve is TÜV approved

•Easy venting

•Can be fitted on the left or right

•Pressure reducing valve with inlet pressure balancing - inlet pressure fluctuation does not influence the outlet pressure

•Housing and connection pipes are chrome plated

•Meets KTW recommendations for potable water

•Certified to Pressure Equipment Directive 97/23/EC, Reference No. CE 0035

Range of Application

For closed hot water storage units up to 200 litres according to DIN 4753 Part 1 and DIN 1988. Tested to TRD 721 for 1.0 to 10.0 bar pressure range.

Medium	Water
Inlet pressure	Max. 16 bar
Outlet pressure	4 bar
Operating pressure	Maximum at least below 20 % opening
	pressure of safety
Technical Data
Opening pressure	Set by manufacturer at 6.0, 8.0 or 10.0 bar
	Subsequent alteration of the setting is not
	permitted and is impossible without
	destroying the security cap
Operating tempera-	Max. 70 °C
ture
Connection size	1/2"
Clearance from wall	70 mm and 100 mm

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SG162D Safety group with pressure reducing valve

Method of Operation

Safety group integrates a check valve, shutoff valve, test point, diaphragm safety valve and pressure reducing valve in one appliance.

Water from the inlet water supply first enters the pressure reducing valve. This functions on a force equalising system - the force of a moving piston operates against the force of an adjustment spring. The inlet pressure has no influence on the opening or closing of the valve. Inlet pressure fluctuations therefore have no influence on the outlet pressure. The check valve has a moving valve disc and flow pushes this open against the force of a spring. The downstream safety valve is a direct operating safety valve - the opening force operates against the force of a spring.

The downstream safety valve is a direct operating safety valve. That is, the opening force operates against the force of a spring.

Options

SG162D-1/2A = Safety valve opening pressure 6.0 bar

SG162D-1/2C = Safety valve opening pressure 10.0 bar

Connection size	R	1/2"	a)	Shutoff valve
Nominal size diameter	DN	15	b)	Test plug for check valve
Dimensions	(mm)		c)	Check valve
	L	100	d)	Diaphragm-type safety valve with venting device (replaceable)
	H	100	e)	Tundish (no special vapour trap required)
	h	100	f)	Pressure reducing valve

EN0H-1305GE23 R0807 • Subject to change

28 www.honeywell.com