Torque Values on Copeland™ Brand Products

1. Recommended Torque with Lubricated Bolts

*See S.A.E. Grade Identification on Table 4 for remaining bolts not specified in this table.

Table 1 - Recommended Torque with Lubricated Bolts

Table 1 – Continued.

Table 2 - Metal Parts

Under tension, metal parts will tend to stretch slightly, and gaskets may relax. Thus, it is quite probable after a period of time in which changes in temperature take place, that bolt torques will be somewhat reduced from the original setting.

If oil or refrigerant leaks should occur, the bolts should be retightened to the original setting. Retorquing of all bolts is recommended. However, pipe plugs with sealant applied at the factory are not to be retorqued or seal broken, as this may create a leak path in the cured sealant.

* Approved pipe thread sealer: Loctite anaerobic PST # 12928/12929 Teflon sealer. Apply sparingly to all threads only. Do Not apply to end surface.

** Internal pressure relief valve: Use Loctite RC-620 to first two threads only.

*** New sight glass design on 1.5 to 8 HP refrigeration scroll compressor after 14L serial number date code.

Table 3 - Condensing Units Parts

Table 4 - General Torque Wrench Settings

S.A.E Grade Identification: Visual representation of Grade 5 and Grade 8 bolt markings. Grade 5 bolt marking shows a single line. Grade 8 bolt marking shows three lines.

2. Valve Stems

Figure 1 through Figure 4 illustrate different styles of valves. Variances in valve stem packing materials, procedures, and torque values will be present. The following procedures should be followed to reduce the chance for leaks.

Figure 1 style contains packing material. Before activating the valve stem, first loosen the brass gland nut (7/16" wrench). Front or back seat the valve stem and then re-torque the brass gland nut, per torques in Table 5.

Figure 2 style contains an 'O' ring seal without provision for gland adjustment. The end is crimped over.

Figure 3 style contains an 'O' ring seal with a gland nut. However, DO NOT loosen the gland nut. If the gland nut is loosened, the seal could be damaged and leak. If the 'O' ring does leak, it may be repaired by removing the gland nut with a special tool, picking out, and carefully replacing the 'O' ring. Do NOT force the 'O' ring, as force may shear the ring. Replace the gland nut using 96-120 inch pounds (11-14Nm) torque.

Figure 1: Style containing packing material.

Figure 2: Style containing an 'O' ring seal without provision for gland adjustment.

Figure 3: Style containing an 'O' ring seal with a gland nut.

Figure 4: Valve Stem Body. This figure shows multiple views (VIEW1 through VIEW7) of valve bodies, illustrating different configurations.

3. Valve Stem Caps

To insure a leak free seal, all valve stem access caps must be employed, with sealing surfaces in good condition, and tightened to the following:

• Plastic caps with rubber gasket: Hand tighten only.
• Metal cap with rubber gasket: Hand tighten only.
• Steel cap with copper gasket: 40-50 inch pounds (4-6Nm)
• Brass cap with copper gasket: 20-30 inch pounds (2-4Nm)

4. Torque Patterns

For all cover plates (heads, bottom plates, shipping pads, valves, etc.) to achieve a proper seal, it is important when applying torque to use a criss-cross pattern. Follow the steps below.

Do not apply torque in a circular pattern. For the initial torque, apply no more then 70% of the final torque using a diagonal criss-cross pattern, similar to the example in Figure 5. Once the initial torque has been applied, apply the proper full torque value, again using a criss-cross pattern. Once the final torque has been applied, start at any bolt, and circle the entire part in sequence. This will verify that a bolt has not been missed and that final torque has been applied.

Figure 5: Diagonal Criss-Cross Pattern. This figure visually depicts the recommended diagonal criss-cross tightening sequence for bolts.

Table 5 - Torque in Valve Body per Stem and Packing Gland

All torques in inch pounds (Newton meters).

The contents of this publication are presented for informational purposes only and are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. Emerson Climate Technologies, Inc. and/or its affiliates (collectively "Emerson"), as applicable, reserve the right to modify the design or specifications of such products at any time without notice. Emerson does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson product remains solely with the purchaser or end user.

© 2019 Emerson.