Tohkemy CMD-G Chemical Pump

Manufacturer: Tohkemy Corporation
Model: CMD-G

Features

CMD Series Overview
Features two diaphragms driven by a single motor, doubling the discharge capacity of the CM series while reducing line pulsation by dosing from both heads into a single line.
Key Benefits
Independent Flow Adjustment: Dual adjustment dials allow separate control for each pump head.
Multi-Chemical Dosing: Supports two different liquid-end materials to dose two distinct fluids simultaneously.
Cost Efficiency: Significantly reduces initial capital expenditure and ongoing running costs.
Operating Notes
Symmetrical Diaphragms: Both pump heads must use the same diaphragm diameter (similar discharge capacities).
Unified Drive: Individual heads cannot be stopped independently during operation.
Automated Control: Exercise caution when integrating with automated systems (e.g., ON-OFF controller output signals).

Specification

Connection	Hose	(3G to 12G) φ4 x φ6mm polyethylene or_ φ4 x φ9mm braided soft PVC (φ6 x φ11mm braided soft PVC hose for XV46, XXU, 444, 4446 type)
	Hose	(30G to 100G) φ6 x φ9mm polyethylene or_ φ6 x φ11mm braided soft PVC
	Flange	(3G to 100G) 15A JIS 10K flange, 13A union
		(200G, 350G) 20A JIS 10K flange, 20A union
		(500G, 700G) 25A JIS 10K flange, 20A union
Motor	Standard	0.2kW, Three-phase, 4P, class E, 60Hz (200/220V), 50Hz (200V), TEFC outdoor flange type
	Semi-standard	0.2kW, Single-phase, 4P, class E, 60Hz (200/220V), 50Hz (100V), TEFC outdoor flange type
		0.2kW, Single-phase, 4P, class E, 60Hz (200/220V), 50Hz (200V), TEFC outdoor flange type
		0.2kW, 7-rated Three-phase, 4P, class E, 60Hz (380/400/440V), 50Hz (380/400/415/420V), TEFC outdoor flange type
		0.2kW or_ 0.4kW, Three-phase, 4P, class E, 60Hz (200/220V), 50Hz (200V), safety-increase explosion-proof outdoor flange type
		0.4kW, Three-phase, 4P, class E, 60Hz (200/220V), 50Hz (200V), pressure and_ explosion-proof outdoor flange type
Reducer		Worm gear reduction type, lubricated with viscosity 320mm2/s (cSt) worm gear oil
Standard accessories	Hose	Foot valve (except for XXU, XXU6, 444, 4446 combination), Ball-type anti-siphonage_ valve (except for XXU, XXU6, 444, 4446 combination), Hose x 4m, Simple tools, Pump mounting bolts and_ nuts (w/washers, M8 x 30L) x 4 sets, Instruction manual, Air extract pump, Air extract hose (PE 0.85m) ( for 3G to 12G, VVFC and_ VVE4 combination)）
Standard accessories	Flange	Simple tools, Pump mounting bolts and_ nuts (w/ washers, M8 x 30L) x 4 sets, Instruction manual, Air extract pump, Air extract hose (PE 0.85m) (for 3G to 12G, VVFC and_ VVE4 combination)
Color		Munsell 2.5PB 5/2 for motor and_ reducer

0.2kW motor

Model	Discharge rate (mL/min)				Max. discharge pressure (MPaG)	Diameters of Pump head / Diaphragm (mm)	Stroke frequency (spm) / Reduction ratio		Maximum Stroke length(mm)	Motor (kW)	Weight (kg)
Model	60Hz	50Hz	60Hz	50Hz	Max. discharge pressure (MPaG)	Diameters of Pump head / Diaphragm (mm)	60Hz	50Hz	Maximum Stroke length(mm)	Motor (kW)	Weight (kg)
CMD-3G	12-60	10-50	50	42	1.0(Single-phase) 1.5(Three-phase)	φ70/φ39	35(1/50)	29(1/50)	2	Single-phase/ Three-phase 0.2	About 21
CMD-7G	28-140	24-116	130	108			35(1/50)	29(1/50)	4
CMD-12G	48-240	40-200	226	188			58(1/30)	48(1/30)
CMD-30G	120-600	100-500	264	220	0.5(Single-phase) 1.0(Three-phase)	φ110/φ90	35(1/50)	29(1/50)			About 22
CMD-60G	240-1200	200-1000	836	696			35(1/50)	29(1/50)	7
CMD-100G	400-2000	320-1600	1334	1112			58(1/30)	48(1/30)
CMD-200G	800-4000	640-3200	3496	2912	0.5	φ150/φ120	58(1/30)	48(1/30)		Three-phase 0.2	About 25

0.4kW motor

Model	Discharge rate (ml/min) at 0.1MPaG				Max. discharge pressure (MPaG)	Diameters of Pump head / Diaphragm (mm)	Stroke frequency (spm) / Reduction ratio		Maximum Stroke length(mm)	Motor (kW)	Weight (kg)
Model	60Hz	50Hz	60Hz	50Hz	Max. discharge pressure (MPaG)	Diameters of Pump head / Diaphragm (mm)	60Hz	50Hz	Maximum Stroke length(mm)	Motor (kW)	Weight (kg)
CMD-3G	12-60	10-50	50	42	1.5	φ70/φ39	35(1/50)	29(1/50)	2	Three-phase 0.4	About 22
CMD-7G	28-140	24-116	130	108			35(1/50)	29(1/50)	4
CMD-12G	48-240	40-200	226	188			58(1/30)	48(1/30)
CMD-30G	120-600	100-500	264	220	1.0	φ110/φ90	35(1/50)	29(1/50)			About 23
CMD-60G	240-1200	200-1000	836	696			35(1/50)	29(1/50)	7
CMD-100G	400-2000	320-1600	1334	1112			58(1/30)	48(1/30)
CMD-200G	800-4000	640-3200	3496	2912	0.5	φ150/φ120					About 26
CMD-350G	1400-7000	1200-5800	6508	5422					12
CMD-500G	2000-10000	1600-8000	8518	7098			112(1/16)	87(1/16)	8
CMD-700G	2800-14000	2400-11600	12134	10112			112(1/16)	87(1/16)	12

Test Conditions
Discharge rates are calculated using clear water at normal temperature, 0.1 MPaG discharge pressure, and -0.01 MPaAq suction head (with pipe diameter matching the pump).

Operating Limits & Specifications
CMD Performance: Flow rate is $2\times$ the CM series.
Pressure Limits (CMD-3G to 12G): Max discharge pressure is 1.0 MPaG (including flange connections and max flow operations).
Temperature Range (Standard): Ambient $0\text{--}40^\circ\text{C}$ ; Liquid $0\text{--}50^\circ\text{C}$ .
NPSH Requirement: Approx. $0.06\text{ MPaA } (0.6\text{ kgf/cm}^2\text{A})$ .
Limitations (CMD-200G to 700G): Hose connection and single-phase motor options are not available.
External dimensions

P/N	Part name
1	Motor
2	Reducer
3	Liquid-end parts
4	Pump frame
5	Flow rate control dial
6	Dial set bolt
7	Pump base

Hose connection

Dimensions	φA	B	C	D	E
CM/CMD-3G～12G	70	274	115	69	172
CM/CMD-30G～ 100G	110	293	125	125	186

Flange connection

Dimensions	φA	B	C	D	E	F	G
CM/CMD-3G～12G	70	274	160	155	172	72	15A JIS10KFF
CM/CMD-30G～100G	110	293	183	187	186	72	15A JIS10KFF
CM/CMD-200G・350G	150	311	232^※	247^※	198	90	20A JIS10KFF
CM/CMD-500G・700G	150	311	230	245	198	95	25A JIS10KFF

*The above dimensions are for VVFC/VVE4. C: 230 and D: 245 for VV46/XXU.

Wet contact structure

P/N	Part name
16	Diaphragm washer
17	Diaphragm
18	Hose lock nut
19	Hose lock ring
21	Check ball
22	Discharge-side valve seat
23	Pump head
24	Suction-side connector
25	Pump head mounting bolt
26	Air extract plug
27	O-ring
30	Suction-side valve seat
31	Gasket
35	Check ball
38	Spring
39	Lock nut
40	Connector
41	Union socket
44	TS flange
50	O-ring
51	Elbow
52	Short pipe
54	Hose joint
55	O-ring
56	Discharge-side connector
57	Float seat
58	Float guide
59	Sight glass case
60	Float

Liquid-end parts specifications

		VVFC		VVE4		XV46(3G-12G) VV46(30G-700G)	XXU(3G-350G) XXU6(500G,700G)	444(3G-12G) 4446(30G-700G)
Applicable chemicals		Sodium hypochlorite, Ferric chloride, PAC, sulfate band, Ferric sulfate, ferric sulfate	hydrochloric acid Dilute sulfuric acid Other Strong acid	Sodium hydroxide	Ammonia water	Polymer flocculants, Sodium hydroxide, Ammonia water	Slaked lime, Sludge, Powdered activated carbon (solution)	methanol
Pump head		PVC		PVC		PVC + SUS RF(XV46) PVC(VV46)	PVC + SUS RF	SUS304
Diaphragm		PTFE		30G-100G: EPDM, others: PTFE			PTFE	PTFE
Connector		PVC		PVC		PVC	PVC + SUS RF	SUS304
Valve seat		FKM		EPDM		–	–	–
Check ball		Ceramics		SUS304		SUS304	Urethane	SUS304
Spring		–		–		SUS316	-/SUS316	-/SUS316
O-ring Packing		Aflas®		Aflas®		XV46：PTFE VV46：Aflas®	Aflas® 3G-12G：PTFE	PTFE
Connection	Hose connection	φ4 x φ9mm or_ φ6 x φ11mm braided soft PVC	φ4 x φ6mm or_ φ6 x φ9mm PE		φ4 x φ9mm or_ φ6 x φ9mm braided soft PVC	φ6 x φ11mm braided soft PVC	φ6 x φ11mm braided soft PVC	φ6 x φ9mm PE
Connection	Flange connection	(3G to 100G) 15A, (200G, 350G) 20A, (500G, 700G) 25A, JIS 10K flange