QYC Front-end Mono Strand Hydraulic jack has internal re-usable anchor which can automatically clamp and loosen the wedge. Mono jack are mainly used for GYM15 and GYM13- type various single tensioning with bonded and unbonded prestressed cable. 

Post Tension Mono Jack is a prestressed front-clamping center hole jack used for single tensile reinforcement construction with GYM15 and GYM13bonded tendons. And it is an anchoring system, which is widely used in pre-tensioned and post-tensioned prestressed concrete structures bridges, geotechnical anchoring, and other constructions, especially for high-altitude operations. as it is easy to carry.

QYC 27ton hydraulic jack is matched with prestressed anchorage widely used in the construction of bridge and buildings, railway and subway, water conservancy and hydropower engineering.  

We can also provide multi-hole front-clamping hole hydraulic jacks:

1. Using the new seals, to synchronous strengthen the seal-ability under great pressure.
2. Mono jack use for 12.7mm pc strand using special alloy steel with heat treatment process, reducing the cylinder's expansion ratio in the tensioning process. So the life of seals and sealing performance can be improved about 20%.
3. In the tensioning and operating process,, jacks is easily damaged under overpressure because of the jack-based pullback cylinder, so we added the overpressure valve on the jacks to pressure production. Meanwhile we improved the original of commonly used structure by wire disc and flanged disc, to make the bearing capacity for oil pressure strengthen. So enormously reduce the possibility of mechanical damage due to improper operation. 

Model	Tonnage	Tension  force	Stroke	Central  diameter	Dimension	Weight	Tension  area	Rated oil pressure	Number of  max. Tension strands
	Ton	kN	mm	mm	mm	kgs	mm²	Mpa	strand
QYC250	25	250	200	φ19	φ105×500	20	4415	60	Single strand
QYC100B	10	100	850	φ10	φ1095×777	37	2230	43	Single strand
QYC300	30	300	400	φ19	φ110×700	20	6263	50	Single strand