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Introduction

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16

Gruvlok

®

couplings for grooved-end pipe

Gruvlok couplings for grooved-end pipe are available in nominal pipe sizes 1" thru

30" and metric sizes. The variety of coupling designs provides a universal means

for the connection for pipe, fttings, and pipe system components. The wide

assortment of Gruvlok couplings and gaskets permit selection of the most suitable

combination for a specifc application, thus providing the most versatile and

economical pipe system installation.

MATERIAL SPECIFICATIONS

ANSI BOLTS & HEAVY HEX NUTS:

Heat treated, oval neck track head bolts conforming to ASTM A 183 Grade 2

with a minimum tensile strength of 110,000 psi and heavy hex nuts of carbon

steel conforming to ASTM A 563 Grade A or Grade B, or J995 Grade 2. Bolts and

nuts are provided zinc electroplated as standard.

METRIC BOLTS & HEAVY HEX NUTS:

Heat treated, zinc electroplated oval-neck track head bolts made of carbon

steel with mechanical properties per ISO 898-1 Class 8.8. Hex nuts are zinc

electroplated followed by a yellow chromate dip.

STAINLESS STEEL BOLTS & NUTS:

Stainless steel bolts and nuts are also available. Contact a Gruvlok

Representative for more information.

HOUSING:

Ductile Iron conforming to ASTM A 536, Grade 65-45-12 or Malleable Iron

conforming to ASTM A 47, Grade 32510.

COATINGS:

Rust inhibiting paint Color: ORANGE (standard)

Hot Dipped Zinc Galvanized (optional)

Other Colors Available (IE: RAL3000 and RAL9000)

For other Coating requirements contact a Gruvlok Representative.

GASKETS: Materials

Properties as designated in accordance with ASTM D 2000

GRADE “E” EPDM (Green color code) NSF-61 Certifed

-40°F to 230°F (Service Temperature Range)(-40°C to 110°C)

Recommended for water service, diluted acids, alkalies solutions,

oil-free air and many chemical services.

NOT FOR USE IN PETROLEUM APPLICATIONS.

Grade “T” Nitrile (Orange color code)

-20°F to 180°F (Service Temperature Range)(-29°C to 82°C)

Recommended for petroleum applications. Air with oil vapors and

vegetable and mineral oils.

NOT FOR USE IN HOT WATER OR HOT AIR

Grade “O” Fluoro-Elastomer (Blue color code)

-20°F to 300°F (Service Temperature Range)(-29°C to 149°C)

Recommended for high temperature resistance to oxidizing acids,

petroleum oils, hydraulic fuids, halogenated hydrocarbons and lubricants

Grade “L” Silicone (Red color code)

-40°F to 350°F (Service Temperature Range)(-40°C to 177°C)

Recommended for dry, hot air and some high temperature chemical services

GASKET TYPE:

Standard C Style

Flush Gap (1" - 14") (25mm - 350mm)

LUBRICATION:

Standard Gruvlok

Gruvlok Xtreme

TM

(Do Not use with Grade “L”)

WORKING PRESSURE, END LOAD, PIPE END SEPARATION &

DEFLECTION FROM CENTER LINE:

Based on standard wall steel pipe with cut or roll grooves in accordance with

Gruvlok specifcations. See technical data section for design factors.

coupling data chart notes

COUPLING DATA CHART NOTES

Nominal

Size

O.D.

Max. Work.

Pressure

Max. End

Load

Range of

Pipe End

Separation

Defection from

C

L

Coupling Dimensions

Coupling Bolts

Specifed Torque Approx.

Wt. Ea.

Per Coupling Per in./ft.

X

Y

Z

Qty.

Size

Min.

Max.

In./DN(mm)

In./mm PSI/bar

Lbs./kN

In./mm Degrees

mm/m In./mm In./mm In./mm

In./mm

Ft.-Lbs/N-m

Lbs./kg

1 2 3 4 5

6

7

8

9

10

1

Gruvlok Couplings are identifed by either the nominal ANSI pipe size in

inches or pipe O.D. in millimeters (see column 2).

Nominal Outside Diameter of Pipe.

Maximum line pressure, including surge, to which a joint can be subjected.

Working pressure ratings are based on standard wall steel pipe with standard

cut or roll grooves in accordance with Gruvlok specifcations. For Performance

Data on other than standard wall pipe, refer to Technical data section.

NOTE:

For one time feld test only the maximum joint working

pressure may be increased to 1.5 times the fgure shown.

Maximum end load from all interior and/or exterior forces to which the

joint can be subjected are based on standard wall steel pipe with standard

cut or roll grooves in accordance with Gruvlok specifcations.

2

3

4

5

Range of pipe end separation is the gap between the pipe ends due to

assembly.

Maximum allowable angular defection of pipe from centerline when

using standard cut grooved steel pipe. For details see design factors in

Gruvlok Technical data section.

“X”, “Y”, and “Z” are external dimensions for reference purposes only.

The quantity of bolts equals the number of housing segments per coupling.

Nuts must be tightened alternating and evenly to the specifed bolt torque.

See individual product installation instructions for additional important

information.

Approximate weight for a fully assembled coupling with gasket, bolts, and

nuts.

6

7

8

9

10

GL-2.10