Two-way Shutoff Quick Couplings Plug
PTT
Two-way Shutoff Quick Release Couplings
How It Works
When the plug is inserted, the internal valve is pushed open, allowing residual pressure to safely escape and complete the connection.
Applicable fluid : oil, hydraulic oil, water, medicine, air (note:Steam and hot water can damage seals, and the extent of the damage depends on the temperature).
Connection Process
During connection:
The internal valve opens, and residual pressure begins to discharge.
After connection:
All remaining pressure is released, ensuring a secure, fully completed connection.
Two-way shutoff quick couplings present closure upon disconnection. When socket and plug are connected, two ends remain open to enable fluid and hydraulic oil to go through. The design of auto aligned valve provides better sealing.
When the plug and socket are disconnected, the design of the poppet valve enables the auto re-set to its original position before connection and enhances the safety sealing of plug or socket.
Quick Couplings include one-way shutoff, two-way shutoff and two-way shutoff (grease type), one touch quick coupling, straight through type, and camlock type.
◎ Auto aligned poppet valve provides a reliable seal.
◎ Leak tested.
◎ Withstanding high pressure seal.
Dimension

Specification
- Connection Type: Female Thread
- Thread Size (PT): 1/4" ~ 2"
- Material: SUS304, Brass
- Seal Material: NBR, VITON
| Working Pressure | SUS304 | Brass |
|---|---|---|
| 1/8" ~ 3/8" | 70 kgf/cm² | 50 kgf/cm² |
| 1/2" ~ 1" | 45 kgf/cm² | 30 kgf/cm² |
| 1-1/4" ~ 1-1/2" | 30 kgf/cm² | 20 kgf/cm² |
| 2" | 20 kgf/cm² | 15 kgf/cm² |
| Part No | Thread Size | Dimensions | h | |
|---|---|---|---|---|
| P-PT | J | L | ||
| PTT1 | 1/8" | 19 | 29 | Hex 14 |
| PTT2 | 1/4" | 22 | 35.5 | Hex 17 |
| PTT3 | 3/8" | 25 | 40 | Hex 21 |
| PTT4 | 1/2" | 28 | 44 | Hex 27 |
| PTT6 | 3/4" | 36 | 52 | Hex 35 |
| PTT8 | 1" | 40 | 62 | Hex 41 |
| PTT10 | 1-1/4" | 45 | 70 | WAF 54 |
| PTT12 | 1-1/2" | 49 | 75 | WAF 63 |
| PTT16 | 2" | 52 | 80 | WAF 77 |
- Files Download
Two-way Shutoff Quick Couplings Plug (PTT ) – CHIBIN Machine
Since 1980 in Taiwan, CHIBIN Machine makes Two-way Shutoff Quick Couplings Plug —compression, push-in pneumatic, hydraulic, quick couplings, and precision nozzle and needle valves for medical and semiconductor use.
Our fittings are ISO-certified and TTQS-awarded, with MIL-STD-105E quality checks. We stock 10,000+ standard parts and offer OEM/ODM custom runs up to 3,000 pcs.
With advanced CNC manufacturing and 40+ years of experience, CHIBIN Machine meets tight specs for surface finish, thread standards, and leak-tight testing. Get a fast quote today.

