Product Details

Product Description

SR202 normal closed Two-way Electric Valve for HVAC 1/2" 3/4" 1'' PN16

Product description:

SR202 electric two-way valve consists of SR202 actuator and SR202 brass valve, used in controlling the cold or hot water pipe on or off in air conditioning system, for the purpose of controlling room temperature. valve is driven by hysteresis synchronous motor, returned by spring. When the valve does not work, it’s in normally closed state, when it works, A opening signal is provided by thermostat, to make the electric valve connect AC power and become opening state, cold water or hot water flows into the fan coil, to provide cool air or hot air for room; once the room temperature reaches the setting point of thermostat, the thermostat will shut down the power of electric valve and the spring will return to make the valve closed, thus cutting off the flow of water into the fan coil. As the valve closed or open, room temperature is always maintained at the thermostat setting temperature range.

SR202 series has two forms : two-way normally closed valve and three-way split valve, the sizes of valve threads are DN15, DN20, DN25 three type.

SR202 electric valve’s actuator and valve itself are installed by threaded sleeve, So, the actuator can be installed after the valve is installed.

Material Description:

Body material: Forged Brass

Stem material: stainless steel (304)

Actuator base: die-cast aluminum

Actuator cover: high strength fire retardant engineering plastics (ABS)

Sealing materials: EPDN

Technical Parameters:

Valve size: DN15, DN20, DN25

Connection: threaded connection

Valve structure: two-way, three-way

Media: hot / cold water

Pressure: PN16

Close differential pressure: 0.18 ~ 0.22Mpa

Power supply voltage: AC220V ± 10%, 50 / 60HZ

consumable power: <6.5W

Run mode: On or Off

Valve action time: Opening time: ≤18S Closing Time: ≤7S

Model and size

model	Size (mm)
	A	B
DN15 two-way valve	55	123
DN15 three-way valve	55	128
DN20 two-way valve	66	124
DN20 three-way valve	66	137
DN25 two-way valve	90	129
DN25 three-way valve	90	145

Specification

Model	Flow Coefficient(KV)	Thread	Differential pressure	Medium	Medium Temp	Ambient Temp	PN	power
DN15 two-way valve	1.0(1.5)	1/2’’	0.25	Water/ Hot water	2-94℃	0-60℃	1.6	AC 24V AC 110V AC 220V 50/60Hz
DN15 three-way valve	1.0(1.5)	1/2’’	0.25
DN20 two-way valve	2.5(3.5)	3/4’’	0.12
DN20 three-way valve	2.5(3.5)	3/4’’	0.12
DN25 two-way valve	4.0(4.8)	1’’	0.08
DN25 three-way valve	4.0(4.8)	1’’	0.08

CERTIFICATION: ISO, TS, API, GOST, CE....etc

We pay much attention in Test process:

(1) Shell Hydrostatic Test

ANSI B 16.34 Section 7.1
Valve Size NPS	Test pressure	Test Time. Sce
Below DN50	1:5 times the 100°F	15 Sce
DN65~DN200	Rating of ANSI Class	60 Sce
Up DN250	Max. Operating Pressure	180 Sce
	Test pressure should be above 1.5 times than the valve's Max work pressure (100F)

(2) Seal Hydrostatic Test

The pressure should be more 1.1 times than working pressure by seal hydrastatic test

ANSI B 16.34 Section 7.2
Valve Size NPS	Test pressure	Test Time. Sce
below DN50	1:1 times the 100°F	15 Sce
DN65~DN200	Rating of ANSI Class	30 Sce
above DN250	Max. Operating Pressure	60 Sce
	Test pressure should be more 1.5 times than the valve's Max work pressure (100F)	180Sce

(3) Seal Air Test

Seal air leakage test is based on 80PSIG(6kgf/cm2) inert-gas or the air reach the test pressure, then close the valve. after that check the valve whether it is leakage or not.

Packaging & Shipping

Our Services

1.100% factory price, because we are direct producer of ball valve, butterfly valves, check/non-return valves, gate valves and so on.

2.Market, technical support and after-sale service within 24 hours.

3. You can order your own configuration.

A: Manual B: pneumatic C: electric D: bare shaft E: disc with pin F: disc without pin G: double half shaft H: one piece body I: two pieces body J: logo