Gearbox for Underground Valve Operation

Worm Gear-Worm Drive Set: Utilizes a worm gear-worm drive set for efficient performance.
Compact & Lightweight: Features a small size and light weight for easy handling and installation.
High Output Torque: Delivers large output torque for robust operation.
Rational Structure: Engineered with a rational structure for enhanced reliability.
Easy to Operate: User-friendly operation for convenience.
Reliable Self-Holding Capacity: Provides dependable self-holding capability to ensure secure operation.
Ideal for Underground Conduit: Suitable for controlling 90° rotary butterfly valves, ball valves, plug valves, and other valves when laying in underground conduits.

Description

Model	A (mm)	B (mm)	C (mm)	D (mm)	E (mm)	K (mm)	H (mm)	F (mm)	F1 (mm)	E1 (mm)	Q (mm)
3DD-15/17	50	111	96	193	60	47	86	210	38	78	130
3DD-15/75	50	121	106	224	70.5	47	86	210	38	98	150
3DD-15/120	50	136	106	241	78	47	86	210	40	108	170
3DD-30/250	65	160	135	283	90	63	105	279	50	123	200
3DD-30/300	65	185	160	320	110	63	123	279	57	140	250
3DD-30/400	65	185	160	355	125	63	129	279	63	160	278
3DD-60/800	69	218	160	420	160	78	132	277	66	170	330

Model	Available Opening of Butterfly Valve (Metric System)	Available Opening of Butterfly Valve (British System)	d (mm)	b (mm)	t (mm)	D3 (mm)	h (mm)	D2 (mm)	D1 (mm)	n-Φd1
3DD-15/17	50~80	2″~3″	12.7	3	15.5	–	–	57.15	92	4-M6
	100	4″	15.9	5	20.5	–	–	69.85	92	4-M8
	125~150	5″~6″	19.05	5	23.65	–	–	69.85	92	4-M8
3DD-15/75	200	8″	22.2	8	25.4	–	–	88.9	125	4-M12
	250	10″	28.6	8	35.2	–	–	88.9	125	4-M12
	300	12″	31.8	8	39.7	–	–	108	140	4-M12
	350	14″	31.8	8	39.7	–	–	108	140	4-M12
3DD-30/250	400	16″	33.1	10	39.9	–	–	158.75	200	4-M18
3DD-30/300	450	18″	38.1	10	47.9	–	–	158.75	200	4-M18
3DD-30/400	600	24″	50.8	16	54.5	–	–	215.9	278	4-M18
3DD-60/800	700	28″	55	16	63.6	–	–	254	300	8-M16
	800	32″	55	16	63.6	–	–	254	300	8-M16

Model	Torque (N·m)	Ratio	Input Torque (N·m)	Weight (kg)
3DD-15/17	170	203:1	9	17
3DD-15/75	750	245:1	30	21
3DD-15/120	1200	280:1	42	23
3DD-30/250	2500	384:1	43	41
3DD-30/300	3000	352:1	57	57
3DD-30/400	4000	416:1	64	65
3DD-60/800	8000	754:1	71	88