Masoneilan 87/88 Ultra-Low Temperature Kits, Actuator Spare Parts (-50 to 100 °C)

Overview

The Masoneilan 87/88 ultra-low temperature kits are the four actuator spare parts kits that Baker Hughes describes as “Low & High Temp. -50 to 100°C”: 720050176-999-0000 for size 6, 720050178-999-0000 for size 10, 720050180-999-0000 for size 16 and 720050182-999-0000 for size 23. Each number follows directly after the standard kit of its size in the same 7200501xx block, which makes them easy to confuse on a stores shelf. The distinction is the −50°C lower limit, the coldest design temperature published for the 87/88 actuator.

In Oman and the GCC, Seven Star LLC supplies the Masoneilan 87/88 ultra-low temperature kits to Oman and GCC operators who maintain cold-service actuators on liquefied gas, regasification and refrigeration equipment, and always checks the temperature option on the actuator before quoting.

Part Number Pairs: Standard Versus −50°C

Baker Hughes numbers the 87/88 kits so that each size has a standard kit and a −50°C kit one digit apart. Reading the fact sheet closely avoids ordering the wrong one.

Only the middle column belongs to this page. The long-stroke 23L has one published kit, the standard 720065596-999-0000, so no ultra-low 23L kit appears in the table.

Masoneilan 87/88 Ultra-Low Temperature Kits: Materials

The −50°C option changes slightly more than the −40°C option. The manual lists the connector cap screw (5), rod scraper (11a), O-rings 12, 13 and 85, diaphragm 25 and yokes 31 and 31a. The cap screw becomes ASTM A193 Grade B8 Class 2 stainless steel, the diaphragm silicone rubber with Dacron fabric, the O-rings silicone, and the yoke ASTM A352 Gr. LC1 with HRc 22 maximum, rather than the LCC grade used at −40°C. These differences are why the fact sheet gives the Masoneilan 87/88 ultra-low temperature kits their own numbers: a −50°C actuator cannot be serviced with a −40°C kit, and certainly not with a standard nitrile kit.

Cold-Service Practice for the Masoneilan 87/88 Ultra-Low Temperature Kits

Never apply silicone grease to the orange silicone parts; use a fluorinated grease such as NIPPON KOYU LOGENEST LAMBDA or equal in place of Dow Corning Compound III. Assemble to the Table 3 torque values and tighten in steps: 21 ft-lb for size 6, 25 for size 10, 30 for size 16 and 31 for size 23 (28, 34, 40 and 42 N-m), tolerance ±10 percent. In cold service the handwheel bearing (item 34) should be repacked with a grease whose low-temperature rating suits the site minimum; the manual quotes Mobilux No. 2 or equal for standard conditions.

Key Features

• Masoneilan 87/88 ultra-low temperature kits in four numbers for actuator sizes 6, 10, 16 and 23
• Design range of −50°C to +100°C, the coldest published for the 87/88 family
• Silicone diaphragm and O-rings, with a stainless connector cap screw and LC1 yoke in the specification
• Suited to Type 87 (air to close) and Type 88 (air to open) actuators
• Quoted against the actuator serial plate and order record

Industrial Applications

Masoneilan lists liquefaction, regasification, refrigeration and separation among the 87/88 actuator markets, together with midstream and upstream oil and gas. In Oman these point to LNG-related facilities and gas-processing packages, where the actuator may sit on a cold valve and see swings between desert heat and process cold. The Masoneilan 87/88 ultra-low temperature kits keep their silicone parts flexible at −50°C and survive +100°C. The complete actuator is on the Type 87/88 actuator page, and the size 10 standard kit is on its own page for comparison.

Matching the Masoneilan 87/88 Ultra-Low Temperature Kits to the Actuator

Two checks identify the temperature class of an actuator that needs the Masoneilan 87/88 ultra-low temperature kits: the serial plate (model number, serial number, supply pressure and possibly a QR code) and the diaphragm colour when the case is first opened. Orange silicone means one of the two wider classes; black nitrile means standard. Between the −40°C and −50°C classes only the order record or Baker Hughes service history is reliable, so ask us to check it. The long-stroke 23L has one published kit, the standard 720065596-999-0000, so no ultra-low 23L kit is listed.

Compare the Masoneilan 87/88 standard temperature kits and Masoneilan 87/88 extended temperature kits before ordering.

Related published Masoneilan pages: Masoneilan 010867003-779-0000 size 23 diaphragm.

Technical Specifications

The table lists the data Baker Hughes publishes for the Masoneilan 87/88 ultra-low temperature kits.

Request a Quote for Masoneilan 87/88 ultra-low temperature kits

Submit your RFQ for the Masoneilan 87/88 ultra-low temperature kits to the Seven Star LLC instrumentation division in Muscat, quoting the actuator size, serial number, the temperature option on the nameplate and the quantity. In Oman and the GCC, we confirm the kit number, check delivery to your site and provide the official Baker Hughes documents attached to this page.