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The MAWP is different

from the approved pre-

ignition pressure.

Consult the factory for

pre-ignition pressure

limits for your

installation.

II. INSPECTION AND INSTALLATION

All Groth Corporation's flame arresters are bi-directional and the installation on a tank or piping system

depends to a great extent on the design of the system. The Model 7618 is recommended for vertical

installation in closed piping systems or venting to atmosphere. If a Model 7618 is installed in a

horizontal line, it should be equipped with drain ports for removal of condensation from the housing.

WARNING: Do not pipe both drainage connections to a common line as

this can provide a passage for flame to by-pass the flame arrester element.

The Model 7628 is designed for either vertical or horizontal installation.

These series of flame arresters have 150# ANSI PN 10 OR PN 16 flange drilling compatibility, [30" &

36" model 7618 & 7628 have API 650 drilling], and are pneumatically tested to 15 PSIG at the factory.

Follow the guidelines listed in Table 2 for flange make-up torque. The arresters are NOT rated for full

flange pressure and do not require high bolting torque. Recommended torque values are based on

pressures [MAWP] in Table 1. Consult factory for higher pressure applications.

Note:

TABLE 1: FLAME ARRESTER MAWP [PSIG (kPa)]

Size

Model

7618

Alum

Model

7618

CS/SS

Model

7628 Alum

Model

7628

CS/SS

50 (345)

100 (690)

150 (1034)

275 (1965)

50 (345)

100 (690)

140 (965)

275 (1965)

50 (345)

100 (690)

140 (965)

275 (1965)

50 (345)

100 (690)

140 (965)

275 (1965)

50 (345)

100 (690)

90 (620)

200 (1379)

10"

50 (345)

100 (690)

75 (482)

150 (1034)

12"

50 (345)

100 (690)

75 (482)

150 (1034)

Sizes > 12" (7618 & 7628): MAWP = 15 PSIG

TABLE 2: BOLT TORQUE [ft-lbs (Nm)]

Flange*

Housing

Size

Raised

Face

Steel

Raised

Face

Aluminum

Flat

Face

Steel

Flat Face

Aluminum

Model

Steel 7618

Model

Steel 7628

Aluminum

Housing

7618

Aluminum

Housing

7628

60 (82)

35 (47)

60 (82)

50 (68)

60 (82)

40 (54)

50 (68)

35 (47)

60 (82)

35 (47)

60 (82)

50 (68)

60 (82)

40 (54)

50 (68)

35 (47)

60 (82)

35 (47)

60 (82)

50 (68)

60 (82)

40 (54)

50 (68)

35 (47)

105

(143)

60 (81)

105 (143)

90 (122)

105 (143)

90 (122)

105

(143)

60 (81)

105 (143)

90 (122)

105 (143)

90 (122)

10"

140

(190)

100 (136)

170 (231)

140 (190)

170 (231)

220 (300)

140 (190)

170 (231)

12"

140

(190)

100 (136)

170 (231)

140 (190)

170 (231)

220 (300)

140 (190)

170 (231)

*Torque values are for reference only and based on a nitrile binder synthetic gasket,

1/16" thick and unlubricated threads.

1 2 3 4 5 6 7 8 9 ... 15 16

Manual for Flame Arrester 1
based on 4

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Groth 7618 Manuale Utente Pagina 4

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