INSTALLATION, OPERATION & MAINTENANCE INSTRUCTIONS
3/14
Model SP158B
Page 2 of 5
Valve Specifications:
1) The Haws Freeze Protection Valve monitors water temperature. When water temperature cools down
to 36
⁰
F or below, the thermostat connects inlet to drain and valve starts bleeding. When water
temperature rises to 42
⁰
F or above, valve will close completely.
2). The Freeze Protection Valve has 1/2 NPT (F) inlet, 1/2 NPT (F) outlet (in-line installation only), 1/2”
NPT (F) drain connections.
Do not install the valve
in-line for drench showers!
It does not have the capacity to provide the
necessary flow.
3). Minimum/Maximum operating pressure: 20 PSI/125 PSI.
Minimum / Maximum ambient temperature: 0°F /130°F.
Maximum water temperature 165°F.
Valve features:
‐
Fully automatic operation.
‐
In-line installation for eyewash only.
‐
Dead-Leg application: valve can be used for eyewash, shower, or combination units.
‐
Contamination resistant seat design for drip free closing.
‐
Paraffin thermostat for industry leading response time and reliability.
Valve Installation:
In-line installation for eyewash only.
For dead-leg installation the outlet should be plugged.
Flow Capacity to Drain, water temperature 36
⁰
F or below.
Dynamic line pressure
Flow Rate
5 PSI
10 PSI
20 PSI
30 PSI
40 PSI
45 PSI
60 PSI
0.9
GPM
1.2
GPM
1.6
GPM
1.9
GPM
2.2
GPM
2.3
GPM
2.7
GPM
In-line installation Flow Capacity through Valve, water temperature 85
⁰
F.
Pressure Drop Across Valve
Flow Rate
5 PSI
10 PSI
20 PSI
30 PSI
40 PSI
45 PSI
60 PSI
7.8
GPM
12.3
GPM
17.4
GPM
24.6
GPM
30.1
GPM
34.8
GPM
42.6
GPM
IMPORTANT
To ensure proper operation of the valve, it is essential that:
‐
Haws Freeze Protection Valve must be located next to the eyewash for eyewash or combination
units.
‐
Freeze Protection bleed valve must be located at the dead-leg of drain shower only.
‐
In-line application: use to feed eyewash only.
‐
Dead-Leg application: valve can be used for eyewash, shower, or combination units.
Failure to comply with installation instructions could result in ineffective freeze
protection, or dangerous flow restriction to showers.