Hayward Flow Control
www.haywardflowcontrol.com
1-888-HAY-INDL (1-888-429-4635)
SBIOM Rev A 10/9/2019
Page 4 of 8
1.3.1.4.2. Solvent-Weld End Connectors (PVC and CPVC only):
1.3.1.4.2.1. Refer to solvent-cement manufacturer’s instructions and cure times.
1.3.1.4.2.2.
Do not install strainer body until solvent cement has fully cured.
Reinstall end connectors by threading nuts
onto body by rotating in a clockwise direction.
1.3.1.4.3. Flange Connections:
1.3.1.4.3.1. NOTE: When provided with flanges, PVC, CPVC, or GFPP SB Series Strainers are provided with an end
connection sub-assembly, consisting of an end connector, connected to a flange, with an assembly nut for
connection to the strainer body.
1.3.1.4.3.2. Flange bolts should be tight enough to compress the gasket and make a good seal, without distorting or putting
excessive stress on the flanges. Suitable washers should be used between the bolt head and flange and the nut
and flange. Bolts should be tightened in alternating sequence (Figure 1). See Table 1 for recommended torque.
Fig. 5: Bolt Tightening Sequence Table 1. Recommended Flange Bolt Torque
1.3.1.5 Once end connectors are installed in piping system, thread the true union nuts onto the inlet and outlet of the strainer body.
2.
OPERATION
2.1
Installing the Basket:
2.1.1
To install the basket into the SB Series Basket Strainer, place basket inside vessel aligning shoulder of basket with shoulder of
vessel body.
2.2
Filling and Pressurizing the Basket Strainer
2.2.1
To fill and pressurize Hayward SB-Series Basket Strainer:
2.2.1.1
Verify that cover o-ring, cover o-ring groove, and cover sealing surface are clean.
2.2.1.2
Verify that cover o-ring is seated inside o-ring groove.
2.2.1.3
Open vent vi a t h e t h u m b s c re w on top of cover (vent is opened by rotating t he t hum bscrew counter-
clockwise). NOTE: Process media will be allowed to escape through outlet of vent as vessel is filled. Prepare to
capture, collect, and dispose of vented chemicals properly.
2.2.1.4
Install cover firmly onto vessel body
2.2.1.5
Do not strike cover.
2.2.1.6
Do not attempt to over-tighten cover.
2.2.1.7
Cover is sealed by means of a pressure energized face sealing o-ring.
Tighten cover hand-tight plus
approximately 1/8-turn
(i.e. 45º). It is not necessary to tighten cover beyond hand tight plus 1/8-turn.
2.2.1.8
Slowly open valve upstream of vessel and start system pump (if necessary).
2.2.1.9
Allow process media to fill vessel, air will be purged through vent on top of cover. After all air has been purged,
process media will start flowing through vent . Close vent by rotating the thumbscrew clockwise.
2.2.1.10 Allow pressure to slowly increase until system operating pressure is reached.
Flange Size
Bolt Dia. (in.)
Torque (ft. lbs.)
½”
1/2
10 – 15
¾”
1/2
10 – 15
1”
1/2
10 – 15
1-¼”
1/2
10 – 15
1-½”
1/2
10 – 15
2”
5/8
15 – 20
2-1/2”
5/8
20 – 25
3”
5/8
20 – 25
4”
5/8
20 – 25
CAUTION
Strainer body must be disassembled from nuts and end connectors prior to solvent cementing end connections into system, Avoid exposing
strainer body and end connector o-rings to primer, solvent cement, or their fumes, as damage to the strainer could result.