Classification of hydraulic fittings

Types of hydraulic fittings

NPTF taper threadfittings

Description: This is a dry seal thread; It is a domestic taper pipe thread for conveying fuel oil. It can be used for both external thread endfittings and internal thread endfittings. NPTF external threads can be fitted with NPTF, NPSF or NPSM internal threads. NPTF fittings are similar to BSPT fittings but not interchangeable. Most sizes of threads have different pitch and profile Angle of 60°, whereas BSPT threads have profile Angle of 55°.

JIC37°taper Angle internal threadfittings

Description: 37°Cone Angle (JIC) The Society of Automotive Engineers (SAE) specifies that 37°cone Angle or cone holder can be used for high pressure hydraulic pipelines. This type offittingsis often called a JICfittings or JIC adapter. JIC external thread is straight thread can only be matched with JIC internal thread, JIC external thread is straight thread, and has a 37°cone seat surface, JIC internal thread is straight thread, and has a 37°cone seat surface. The seal is formed at the 37°cone seat surface. Some sizes of thread are the same as SAE45°cone thread. The cone Angle should be carefully measured to distinguish.

SAE 45°taper male thread adapter

Description: SAE(45°Cone Angle) This is the term used for pipefittings with a 45°cone Angle or cone seat. Soft copper pipes usually use this fittings because the material can be easily machined to a 45°Angle. Thisfittings is suitable for low pressure applications such as fuel lines and refrigeration lines. SAE 45°taper external thread can only be matched with SAE 45°taper internal thread. SAE external threads are straight threads with 45°taper seat. SAE internal threads are also straight threads and have a 45°taper mount. The seal is formed at the 45°cone seat surface. Some sizes of thread are the same as SEA 37°taper thread. The cone Angle should be carefully measured for zone running.

O-ring end face sealing outer threadfittings

Note: O-ring end seal outer thread can only be matched with o-ring end seal inner thread, the outer thread is straight thread with O-ring; The inner thread is straight thread with sealing end face, the outer thread is sealed at the O-ring, and the inner thread is sealed at the sealing end face.

O-ring plane seal fixed external thread fittings

Note: When the o-ring on the outer thread fittings is in contact with the plane on the inner threadfittings to form a seal, the elastomer seal can be used in the hydraulic system to control leakage, and in the case of leak proof function is very important, this kind of pipefittings can be used.

pressure sleeve type pipe joint

Note: Pressure sleeve type fixed external threadfittings can only be matched with pressure sleeve type internal thread nut and pressure sleeve. External connection is straight thread with 24°taper seat. The inner thread head is straight thread with pressure sleeve as sealing face. The seal is formed between the pressure sleeve and the 24°cone seat of the external thread joint, and between the pressure sleeve and the inner pipe of the internal threadfittings.