VEP Threaded Hydraulic Couplers - High Pressure, Connect Under Residual

VEP threaded hydraulic quick couplings feature thread-to-connect locking mechanism, fully eliminating brinelling failure caused by high-frequency impulse stress that ordinary ball-lock couplers suffer. Flat-face valving design on both halves delivers zero-leak sealing throughout connection and disconnection, with special nipple structure supporting direct connection under residual pressure up to 25 MPa. Ideal for excavators, construction machines, and heavy mobile equipment in high-pressure, high-vibration hydraulic circuits.

Application

VEP Threaded Hydraulic Couplers - High Pressure, Connect Under Residual

Characteristics

VEP threaded hydraulic quick couplings  feature a new valve design that resists damage from high-flow and pressure impulse conditions, delivering advanced durability. A special nipple profile allows connection and disconnection under high residual pressure – no need to fully depressurize the system. The threaded sleeve locking mechanism requires manual engagement with matching male threads for a secure, vibration-proof hold. New chrome plating provides superior rust resistance. During connect and disconnect, flush valving mates both halves together, minimizing fluid loss and preventing air inclusion. An anti-blowout BFT bonded seal protects against seal failure in severe service environments. Machined from solid steel bar stock, VEP couplings are fully compatible with STUCCHI VEP Series.

Specifications

Materials	zn/zn-ni plated carbon steel body
Seals	standard in nitrile NBR. On request FKM&EPDM seals
Back-up ring	PTFE
Working temp	with standard seals -25°+125°

HL-VEP DNP PST4 Holmbury HFT Dixon VEP Eaton FD96

Technical Data

HL	ISO	L1	L2	L3	D	S1	S2	S3	T	COD(F)	COD(M)
04	12.5	138.8	70.8	85	41.8	38	30	27	1/2’’BSP	VEP-04F-BSP	VEP-04M-BSP
06	20	164	84.5	97.4	49.8	46	36	36	3/4’’BSP	VEP-06F-BSP	VEP-06M-BSP
08	25	190.5	99.7	113.6	53.8	55	46	46	1’’BSP	VEP-08F-BSP	VEP-08M-BSP
10	31.5	206.2	106.8	123.4	69.8	65	55	55	1-1/4’’BSP	VEP-10F-BSP	VEP-10M-BSP
12	40	253.9	133.5	150	92	85	65	65	1-1/2’’BSP	VEP-12F-BSP	VEP-12M-BSP
16	50	383.5	224.8	218.4	200	85	90	90	2’’BSP	VEP-16F-BSP	VEP-16M-BSP

Nominal Size		Max.Working Pressure	Rated flow	Max flow rate	Min.Burst Pressure			Fluid Spillage
Nominal Size		Max.Working Pressure	Rated flow	Max flow rate	Male	Female	Coupled	Fluid Spillage
HL	ISO	（bar）	(l/m)	(l/m)	(bar)	(bar)	(bar)	(cc)
04	12.5	550	45	90	1400	1000	2400	0.12
06	20	550	76	150	1400	1000	1400	0.15
08	25	500	100	200	1250	1000	1250	0.02
10	31.5	470	189	280	1200	800	1200	0.03
12	40	400	379	700	1100	800	1100	0.05
16	50	350	758	1000	1100	800	1100	0.1

Accessories
HL	ISO	Female Dust Plug	Male Dust Cap	Material
04	12.5	VEP-04-SDP	VEP-04-SDC	Plastic
06	20	VEP-06-SDP	VEP-06-SDC	Plastic
08	25	VEP-08-SDP	VEP-08-SDC	Plastic
10	31.5	VEP-10-SDP	VEP-10-SDC	Plastic
12	40	VEP-12-SDP	VEP-12-SDC	Plastic
16	50	VEP-16-SDP	VEP-16-SDC	Plastic

Applications

The VEP series is the right choice when ball-lock couplers keep failing:

🔨 Hydraulic breakers & hammers – High-frequency impulse stresses

🚜 Excavators & construction equipment – Frequent attachment changes, high vibration

🏭 Heavy industrial hydraulics – High-flow, pressure spike environments

⛏️ Mining equipment – Extreme duty, residual pressure connections

🛠️ Mobile hydraulics with high impulse – Where reliability is critical

Advantage

With 15+ years in hydraulics, we offer strict quality control and a full range of pneumatic & hydraulic products. Sample and small batch orders are welcome. OEM available – your label or drawing. Questions answered within 24 hours.